Rebecca L / TripAdvisor An erratic is a fancy way of referring to a rock left by glaciers away from its original bedrock. This boulder is at least 15 feet tall (~5 m), and is a glacial erratic that was most likely plucked from the bedrock beneath Long Island Sound and later deposited along the Roanoke Point Moraine during the retreat of the Wisconsinan glaciers some 20,000 years ago. Old postcard, mailed in 1910. Old postcard, mailed in 1907. “They’ve been in the ground a very long time,”… Even bigger is the famous Madison Boulder in Madison, New Hampshire, considered the largest glacial erratic in the United States. Glacial erratic (Balanced Rock; now called Balance Rock) on Mt. Danielson, Killingly, Windham Co., Connecticut, USA, Fitchburg, Worcester Co., Massachusetts, USA. The boulder at the top of this trail is the largest known glacial erratic among the hundreds found in the Willamette Valley. Glacial erratic. Contestants were given a month to follow up on our challenge to find the biggest or best glacial erratics in the area, specifically on the northern Quimper Peninsula (land) north of Highways 101 and 104. Prints available from sheepriverphotography.com Early 20th century postcard. --Mmh 20:39, 31 August 2009 (UTC) Find what little I can find, it would appear that the Botsmark erratic is indeed larger than Big Rock erratic. Old postcard. Comprised of 16,500 tons of quartzite, the Big Rock, or Okotoks, erratic is the largest known glacial erratic on the planet. The Furtwängler Glacier is a small remnant of an enormous icecap which once covered the summit of Mount Kilimanjaro. A large glacial erratic. Okotoks Erratic, situated 7 km west of Okotoks, Alberta, Canada, is a supreme example of a glacial erratic. NPS Photo. A large conglomerate boulder, a glacial erratic, finally saved from destruction in 1930 by the City of Fall River. These boulders are believed to have traveled from Jasper during the Ice Age when a landslide deposited them on an advancing glacier. According to the NY Times (July 8, 2007): "When it was last measured in 1986, Cochegan Rock was 54 feet long, 50 feet high, 58 feet wide and weighed 7,000 tons. Maine Geological Survey. A large 90-ton glacial erratic, composted of a metamorphic rock called argillite, is located few miles west of McMinnville, Oregon at the top of a ¼-mile-long steep trail on a knoll (see default photo). The evidence of our ever-shifting landscape surrounds us, recorded in the hills, and etched in stone. Files should either be in the relevant subcategory or in the parent category. Mrs. Pepper and the 360 Science Project visit Daggett Rock, the largest glacial erratic in North America, located in Phillips, Maine. Glacial erratic boulder at Lake Quassapaug. It sits within a small park with signage. —Credit: Brian Washburn Big Rock, also known as Okotoks Erratic, is located near the Canadian town of Okotoks, south of Calgary, Alberta. Old postcard, mailed in 1907. Here large white feldspar phenocrysts can be clearly seen on the boulder, revealing that this stone is not Fitchburg granite, but porphyritic Kinsman quartz monzonite, originating at least 50 miles to the ... Pittsfield, Berkshire Co., Massachusetts, USA. - Skehan, James (2001), Roadside Geology of Massachusetts. This large glacial erratic, composed of a metamorphic rock called argillite, was once much larger! Old postcard. Large glacial erratic. Glacial erratics dot a field in Yellowstone National Park. The glacier moved it from a ledge located about two miles north and west in the town of Albany. The Bering Glacier ends at the edge of Vitus Lake, which is located outside the Wrangell-St. Elias National Park and Preserve area. North Smithfield, Providence Co., Rhode Island, USA. This boulder was first thought by some to be a "meteor" (meteorite), but was later found to consist of primarily manganese minerals. The city of Lake Stevens inherited a majestic relic of the Ice Age Floods, which in 2017 was nestled in the trees on a steep ravine in a 20-year-old subdivision of multi-level homes. A large glacial erratic. Greenwood Lake, Town of Warwick, Orange Co., New York, USA. Part of the granite quarry can be seen in the lower left ... Brimfield, Hampden Co., Massachusetts, USA. DOI: 10.3285/eg.63.1.03 Abstract: Exotic ice-rafted debris from the breakup of ice-dammed glacial lakes Missoula and Columbia is common in slackwater areas along the 1,100-km route for outburst floods in the northwestern US. Other examples of glacial erratics include: Plymouth Rock, the site in Plymouth, Massachusetts that the Mayflower Pilgrims landed in 1620. Text. Geologists believe that Daggett Rock was actually brought all the way from Saddleback Mountain in Rangeley. Glacial erratic. It is purported to be the largest glacial erratic in New England, although I am not certain that is an official title. Old postcard, mailed in 1906. Early 20th century postcard. Category:Glacial erratics in the United States by state. Madison Boulder is a huge granite rock measuring 83 feet in length, 23 feet in height above the ground, 37 feet in width, and weighs upwards of 5,000 tons! The two tectonic plates most directly affected by the presence of the Bering Glacier are the North American and Pacific plates. What Is the Largest Glacier in North America? Jump to navigation Jump to search. This reduced weight means that the tectonic plates below are free to move with ease, resulting in an increased occurrence of earthquakes. A large glacial erratic. GFL-87. Judge's "Cave" is the site where in 1661, two of the 59 judges who had signed the death warrant for King Charles I, William Goffe and Edward Whalley, hid out for awhile after escaping from England. Middlebury, New Haven Co., Connecticut, USA. A glacier is a large mass of compressed snow and ice that is in constant motion because of its immense weight. The erratics’ historical and cultural significance is evident by the pictographs present on one of the largest erratics in North America known as “Big Rock”. Big Rock - Okotoks, Alberta - World's Largest Glacial Erratic (12x18 Signed Print Master Art Print w/Certificate of Authenticity - Wall Decor Travel Poster): Amazon.ca: Home & Kitchen Stoddard, Cheshire Co., New Hampshire, USA, Winsted, Winchester, Litchfield Co., Connecticut, USA. Download. Early 20th century postcard. Another early 20th century postcard view of Rollstone boulder, a large glacial erratic which was on the summit of Rollstone Hill. Old postcard view. Description. Monument Beach, Bourne, Barnstable Co., Massachusetts, USA, Orleans, Barnstable Co., Massachusetts, USA. Old postcard, early 20th century. Africa, specifically East Africa, has contained glacial regions, possibly as far back as the last glacier maximum 10 to 15 thousand years ago. Early 20th century postcard. Old postcard view. Niantic, East Lyme, New London Co., Connecticut, USA. Early 20th century postcard. Like all glaciers around the world, the Bering Glacier is currently threatened by global climate change. 1906) of Rollstone boulder, a glacial erratic on the summit of Rollstone Hill. Postally used in 1906. The largest of these glacial erratics (rocks from distant geologic formations transported and deposited by glaciers) is the mammoth stone in Madison NH, south of Conway NH: 83 feet (25 meters) long, weighing 5000 US tons (4536 metric tons), but smaller glacial erratics … Glacial erratics dot the landscape near the Beartooth Mountains in Montana. First reported in a post on this website, this hulking brute of a monolith lies hidden among the bushes in a tranquil-appearing subdivision.… The largest glacial erratic on Cape Cod. Early 20th century postcard. Glacial erratic on Mt. The largest glacier in North America is the Bering Glacier. Located in Wrangell-St. Elias National Park and Preserve in the US state of Alaska, the glacier is part of the Bagley Icefield, which is recognized as the largest of its kind outside of the polar regions of North America. Windham, Rockingham Co., New Hampshire, USA. This article highlights the largest glacier in North America. The power of the glacier can be appreciated by determining the source of the boulder. Erratics can be carried for hundreds of kilometers, and can range in size from pebbles to large boulders. Wachusett. Old postcard view. It was carried here on a iceberg during an Ice Age some 20,000 years ago, probably by way of the Columbia River. Old postcard, mailed in 1907. Media in category "Glacial erratics in Washington (state)" The following 7 files are in this category, out of 7 total. The evidence of our ever-shifting landscape surrounds us, recorded in the hills, and etched … Seasonal snow does exist on the highest peaks of East Africa as well as in the Drakensberg Range of South Africa, the Stormberg Mountains, and the Atlas Mountains in Morocco. Jump to navigation Jump to search. Geology. Authors. Card was mailed in 1909. Glacial erratics dot a field in Yellowstone National Park. Peter. Glacial Erratic. #geologyrocks⚒ #igersnewengland #newengland_igers Close Charles T. Jackson (1839) apparently referred to it in his Report on the Geological and Agricultural Survey of the State of Rhode Island, as a "Diluvial Boulder of Granite resting on Gneiss." During the last ice age, a large rockslide crashed down onto a glacier and then part of it, the gigantic erratic, was carried on the glacier to its present location on the prairie landscape. Glacial erratics dot the landscape near the Beartooth Mountains in Montana. Thomas K. Weddle. It has been carried by glacial ice, often over distances of hundreds of kilometres. Mostly granite or granodiorite, it’s a tough rock that, paradoxically, likes to fracture and exfoliate due to cracks and faults admitting water. Old postcard, postmarked 1911. Their reward was a Jefferson Land Trust hat embroidered with “Erratics Rock.” Some participants were compelled to journey farther—more power and gas to them. The settlers later claimed that during full moons, witches would emerge from the boulder’s cracks. Big Rock - Okotoks, Alberta - World's Largest Glacial Erratic (24x36 Fine Art Giclee Gallery Print, Home Wall Decor Artwork Poster): Amazon.ca: generic In addition, it is associated with Blackfoot legends. Geologists estimate that the boulder originally weighed about 160 tons- visitors have removed over 70 tons. Old postcard, mailed in 1905. An erratic is a fancy way of referring to a rock left by glaciers away from its original bedrock. – E&G Quaternary Science Journal, 63 (1): 44–59. This is the largest known erratic left by the Puget lobe of the Cordilleran Ice Sheet [34' tall, 78' long]. The granite boulder known as Balance Rock is a glacial erratic. ton, USA. Vitus Lake empties into the Gulf of Alaska by way of the Seal River. This meta category should only contain other categories. Even bigger is the famous Madison Boulder in Madison, New Hampshire, considered the largest glacial erratic in the United States. Such rocks can be found throughout the park, including the famous "Glacial Boulder" near Inspiration Point in the park. Glacial erratic. James Keith, an immigrant from Scotland, preached his first sermon here in 1664. Commonly known as Big Rock, this quartzite boulder is the world's largest known glacial erratic at 16,500 metric tons. Old postcard view of Daggett Rock (Cleft Rock), probably the largest glacial erratic in Maine, weighing as much as 8000 tons. Glacial erratic boulders on West Rock in New Haven. The largest known Glacial erratic is Big Rock near Okotoks, Alberta, Canada. Daggett Rock - Maine's Largest Glacial Erratic Maine Geological Survey Daggett Rock Daggett Rock is approximately 80 ft long, 30 ft wide, and 25 ft high and may weigh as much as 8000 tons. Big Rock is not the largest known glacial erratic. A large glacial erratic split in two. Files should either be in the relevant subcategory or in the parent category. It has been carried by glacial ice, often over distances of hundreds of kilometres. It is the largest meteorite found in North America and the sixth largest in the world. This erratic lies to the west of the town of Okotoks, has Blackfoot ochre pictographs and is the site of Blackfoot ceremonies (Goodenough, 2014). If this occurs, the glacier will retreat at a much faster rate and will create a large fjord in the area. The glacier moved it from a ledge located about two miles north and west in the town of Albany. Glacial erratic. Madison Boulder is a huge granite rock measuring 83 feet in length, 23 feet in height above the ground, 37 feet in width, and weighs upwards of 5,000 tons! A glacial erratic is glacially-deposited rock differing from the size and type of rock native to the area in which it rests.“Erratics” take their name from the Latin word errare (to wander), and are carried by glacial ice, often over distances of hundreds of kilometres.Erratics can range in size from pebbles to large boulders such as Big Rock (16,500 tonnes or 18,200 short tons) in Alberta. Caption 1. Epping, Rockingham Co., New Hampshire, USA. According to the Maine Geological Survey website: "Daggett Rock is approximately 80 ft long, 30 ft wide, and … Daggett Rock is considered the largest glacial erratic in Maine, and it's among the largest in the entire world! Madison Boulder Natural Area is home to the largest known glacial erratic in North America, and among the largest in the world. Prices and download plans . New Haven, New Haven Co., Connecticut, USA. Native Americans warned early English colonists to avoid the boulder, claiming it was a gathering place for evil spirits. According to the Maine Geological Survey website: "Daggett Rock is approximately 80 ft long, 30 ft wide, and 25 ft high and may weigh as much as 8000 tons. Early 20th century postcard. A 42-ft. high glacial erratic boulder. Glacial erratic. Old postcard view of graffiti-covered Balance Rock, a glacial erratic. Old postcard view of a large frog-shaped glacial erratic. Mattapoisett, Plymouth Co., Massachusetts, USA. Aquinnah, Martha's Vineyard, Dukes Co., Massachusetts, USA. This boulder was deemed hazardous by the city in the 1950s and destroyed. Waterbury, New Haven Co., Connecticut, USA. Old postcard view. Actually the ... Hague Township, Warren Co., New York, USA. Large glacial erratic located in the Camp Hedding area. Even bigger is the famous Madison Boulder in Madison, N.H., considered the largest glacial erratic in the United States. A large glacial erratic, also known as Butterfield Rock or Butterfield's Rock. Tree growing out of top of a glacial erratic. Near Sylvan Lake. Weymouth, Norfolk Co., Massachusetts, USA. Early 20th century postcard view. Glacial erratic. Early 20th century postcard. It is a type of rock not normally found in Oregon because it came from the Northern Rocky Mountains. Lakeside, Danbury Township, Ottawa Co., Ohio, USA, Oracle, Oracle Mining District, Pinal Co., Arizona, USA. Madison Boulder is a huge granite rock measuring 83 feet in length, 23 feet in height above the ground, 37 feet in width, and weighs upwards of ... An enormous glacial erratic. Although clearly an erratic there is controversy about its source. As the Bering Glacier continues to retreat and thin out, it loses a great deal of its mass. Jun 16, 2018 - By Dave Tucker July 18, 2011 What may be the largest glacial erratic in the US has been spotted in Lake Stevens Washington, which is southeast of Marysville and east of Everett. San Jose Mine, East Foothills, Black Wonder Mining District, Santa Clara Co., California, USA. Ten kilometers west of Okotoks on Highway 7 is the Big Rock, the largest glacial erratic in the world. Photo courtesy of USGS. Seismic activity, or earthquakes, is caused by the movement of tectonic plates. As Bering Glacier continues to melt, its runoff will cause an increase in the size of Vitus Lake, and researchers believe this increase will eventually lead to the disappearance of the land that separates the lake from the Gulf of Alaska. A large glacial erratic on South Mountain. The erratic of Botsmark is even larger. Glaciers can pick up chunks of rocks and transport them over long distances. Old postcard, mailed in 1909. Publication Date . The evidence of our ever-shifting landscape surrounds us, recorded in the hills, and etched in stone. That's a journey of about 12 miles! It has broken into three pieces since coming to rest. Contact Us. Old postcard, mailed in 1906. Early 20th century postcard. Glaciers can pick up chunks of rocks and transport them over long distances. Old postcard, mailed in 1906. Madison Boulder, a 5,000-short-ton (4,500 t) glacial erratic the size of a large house in Madison, New Hampshire. Target Rock is a glacial erratic boulder, said to have been used for target practice by British soldiers during the Revolutionary War. After months of thought, and a few bottles of red wine, I’ve decided that what Lanark needs is an annual contest to find the largest glacial erratic in Lanark County that has not previously been mentioned on this web site or in a scientific report or that has not previously won a prize in a similar contest. Granite boulder. The largest glacial erratic in the world. Geologists estimate that the boulder originally weighed about 160 tons- visitors have removed over 70 tons. Fifteen-foot high boulder. Pretty cool for outdoor escapade.The Big Rock, is the world's largest glacial erratic found in Okotoks Alberta Canada. This is the largest glacial erratic found in the Willamette Valley. Feb 10, 2016 - By Dave Tucker July 18, 2011 What may be the largest glacial erratic in the US has been spotted in Lake Stevens Washington, which is southeast of Marysville and east of Everett. "Erratics" take their name from the Latin word errare, and are carried by glacial ice, often over distances of hundreds of kilometres.Erratics can range in size from pebbles to large boulders such as Big Rock (15,000 tonnes or 17,000 short tons) in Alberta. The Foothills Erratics Train is of scientific value in the interpretation of the interaction of Cordilleran (mountain) and Keewatin (continental) ice masses, and the subsequent development of a late Pleistocene chronology. Early 20th century postcard view. The rock was deposited when the ice melted. Rebecca L / TripAdvisor . This meta category should only contain other categories. Old postcard view of Daggett Rock (Cleft Rock), probably the largest glacial erratic in Maine, weighing as much as 8000 tons. Old postcard view. Glacial erratic. A large glacial erratic (granite), the "largest boulder in the United States," according to the caption on this postcard. - Buy this stock photo and explore similar images at Adobe Stock Glacial erratic boulders of all sizes are everywhere, sinking down and resting wherever they were when the last Ice Age ended about 10,000 years ago. Publication Code. What Are The Differences Between True North, Grid North, And Magnetic North. In the long run, This 83-foot-long behemoth weighs approximately 4,662 tons. Glacial erratic boulder on beach at Tonset in Orleans. This old postcard was mailed in 1916. South Nyack, Orangetown, Rockland Co., New York, USA. Old postcard view, early 20th century. Old postcard. One of the largest known glacial erratics in the world is found at Jasper National Park in Alberta, Canada. Old postcard, mailed in 1908. A large glacial erratic on South Mountain. The Madison granite boulder is 83 feet long, 37 feet front to back, 23 feet tall, and is estimated to weigh 6000 tons. ): Jigsaw Puzzles - Amazon.com FREE DELIVERY possible on eligible purchases Rochester, Plymouth Co., Massachusetts, USA. Use VR to go inside the rock and learn about glacial history. Such rocks can be found throughout the park, including the famous "Glacial Boulder" near Inspiration Point in the park. … It has broken into three pieces since coming to rest. That fractured glacial erratic weighs 18,200 tons and was once part of a mountain formation. Buy Big Rock - Okotoks, Alberta - World's Largest Glacial Erratic (12x18 Premium 300 Piece Adult Jigsaw Puzzle, Made in USA! From Wikimedia Commons, the free media repository. Early 20th century postcard. Glacial erratics are stones and rocks that were transported by a glacier, and then left behind after the glacier melted. A glacial erratic boulder. Rollstone Hill Quarries, Fitchburg, Worcester Co., Massachusetts, USA, Neutaconkanut Hill, Providence, Providence Co., Rhode Island, USA. "A granite erratic perches on a lower granite erratic that in turn is delicately balanced on a rounded granite hillock." Sign in Sign up for FREE Prices and download plans However, it is expected that by … Files. Madison Boulder is one of the largest glacial erratics in the world. Old postcard, mailed in 1913. This is the largest glacial erratic found in the Willamette Valley. Feb 10, 2016 - By Dave Tucker July 18, 2011 What may be the largest glacial erratic in the US has been spotted in Lake Stevens Washington, which is southeast of Marysville and east of Everett. The largest glacial erratic ever discovered, the report adds, weighed 16,500 tons – exponentially heavier than the 150-ton rock discovered underground in Everett last week. See more ideas about Bouldering, Rock types, Rests. Old postcard view of Cobble Rock, originally known as Coblin Rock, a large glacial erratic located in North Smithfield on the Woonsocket line. The county is largely forested with pine, maple, and birch, except for large stands of spruce and fir in the northwest. Woodstock, Grafton Co., New Hampshire, USA. The snow and low temperatures of the icefield have contributed to the development of the Bering Glacier over time. The glacier moved it from a ledge located about two miles north and west in the town of Albany, New Hampshire. This 83-foot-long behemoth weighs approximately 4,662 tons. Maine Geological Survey, Geologic Facts and Localities, Circular GFL-87. Download Full Text (561 KB) Document Type. Glacial erratics. A glacial erratic is a piece of rock that differs from the size and type of rock native to the area in which it rests. This 83-foot-long behemoth weighs approximately 4,662 tons. First reported in a post on this website, this hulking brute of a monolith lies hidden among the bushes in a tranquil-appearing subdivision.… Glacial erratic boulder with tree growing out of it. It's a Not chosen size geocache, with difficulty of 1, terrain of 1. From Wikimedia Commons, the free media repository. Glacial erratic. Glaciers are typically located on mountain tops and can be found throughout the world, and the mountains in North America are no exception to this pattern. Visitors at Erratic Rock can look out across the vast landscape and imagine the huge amount of water … Scientists sometimes use erratics to help determine ancient glacier movement. It has previously been … Recommended Citation. Old postcard, mailed in 1913. They ended up in the frontier town of Hadley, Massachusetts, and were never ... Kent, Scituate, Providence Co., Rhode Island, USA. Eastham, Barnstable Co., Massachusetts, USA. The power ... An early 20th century postcard view (ca. Jun 7, 2016 - Glacial erratic is a piece of rock that differs from the size and type of rock native to the area in which it rests. August 1916. This 83-foot-long behemoth weighs approximately 4,662 tons. Even bigger is the famous Madison Boulder in Madison, New Hampshire, considered the largest glacial erratic in the United States. The erratic was originally much larger. Geology blogger Dave Tucker has more details on the Lake Stevens Erratic. Panorama Hills "Crater Rock": This "Buffalo Rubbing Stone" is easily the largest exposed erratic within Calgary city limits, accessed from Panorama Hills Way just off Country Hills Boulevard. Glacial erratics are often pushed hundreds of kilometers away from their origin by way of glacial movement. Other articles where Madison Boulder is discussed: Carroll: A landmark is the Madison Boulder, one of the largest granite glacial erratics, measuring 83 feet (25 metres) tall and 37 feet (11 metres) wide. Weighing in at 12 million pounds, Madison Boulder is the largest glacial erratic in North America and among the largest boulders in the world. Threatened by ongoing quarrying operations, this popular boulder was later blown up and reassembled on Fitchburg's upper common, where it can still be seen today. TryppAdams / TripAdvisor Daggett Rock is considered the largest glacial erratic in Maine, and it's among the largest in the entire world! It is located near the summit of Mount Kilimanjaro in Tanzania. 51° 9'6.71"N, 114° 4'12.81"W. Category:Glacial erratics in the United States by state. Jun 7, 2016 - Glacial erratic is a piece of rock that differs from the size and type of rock native to the area in which it rests. Referred to as the Lake Stevens Monster, the giant rock is considered the largest erratic in Washington and maybe in the United States. Amazon.com: Lantern Press Big Rock - Okotoks, Alberta - World's Largest Glacial Erratic (10x15 Wood Wall Sign, Wall Decor Ready to Hang): Wall Art Generally, tectonic plates are prevented from moving and sliding into and under each other by the extreme weight of glaciers. This is an old postcard view of a large glacial erratic boulder called "Witch Rock." Manomet, Plymouth, Plymouth Co., Massachusetts, USA. Geologists estimate that the boulder originally weighed about 160 tons--visitors have removed over 70 tons. Lake Stevens "Monster" Glacial Erratic. Old postcard. This 40-ton rock was deposited during a prehistoric flood. Okotoks Erratic, situated 7 km west of Okotoks, Alberta, Canada, is a supreme example of a glacial erratic. 8-1-2004. Postcards are c.1905 to 1918. Daggett Rock - Maine's Largest Glacial Erratic. Glacial Erratic Rock (GC14JT5) was created by Mr. & Mrs. Kensquach on 7/23/2007. NPS Photo. mailed in 1909. Ship Rock, a 2200 ton glacial erratic boulder, the largest in the area. Somerset, Bristol Co., Massachusetts, USA. Jul 25, 2012 - Big Rock, Okotoks, AB. Interestingly, researchers believe that the retreat of the Bering Glacier may be responsible for increased seismic activity in the area. Commonly known as Big Rock, this quartzite boulder is the world's largest known glacial erratic at 16,500 metric tons.Glacial erratics are often pushed hundreds of kilometers away from their origin by way of glacial movement. Old postcard, mailed in 1907. It's located in Oregon, United States.An earth cache for us valley dwellers. Rick Thompson is a detective of Oregon geologic history and he’s on trail of one of the region’s oldest mysteries: how hundreds of Montana granite stones ended up in farm fields in Oregon’s Willamette Valley. Baldwinville, Templeton, Worcester Co., Massachusetts, USA, Goffstown, Hillsborough Co., New Hampshire, USA. Glacial erratic. The point at which the glacier ends has also changed over the years, and is now located about 7.5 miles further inland from the edge of Vitus Lake than previously reported. All maps, graphics, flags, photos and original descriptions © 2020 worldatlas.com, The Aletsch Glacier - The Largest Glacier In The Alps. It is an important symbol in American history. The trail to the rock provides an excellent view of Yamhill Valley Vineyards. The 17-acre site was acquired by the state of N.H. in 1946. Westminster, Worcester Co., Massachusetts, USA. Madison Boulder Natural Area is home to the largest known glacial erratic in North America, and among the largest in the world. Old postcard, mailed in 1919. By Amber Pariona on April 10 2018 in Environment. North Salem, Westchester Co., New York, USA. Doane Rock, the largest exposed boulder in Cape Cod. Glen Rock Borough, Bergen Co., New Jersey, USA, Newport, Sullivan Co., New Hampshire, USA. Glacial Erratics. According to the New Hampshire Department of Resources and Economic Development: "Madison Boulder...[is] the largest known erratic in New England, and among the largest in the world. Publisher. Glacial erratic on Tuftonboro Neck. Runoff from the glacier is responsible for providing 6.5 trillion tons of water to the gulf each year. Mason, Hillsborough Co., New Hampshire, USA, Wickford, North Kingstown, Washington Co., Rhode Island, USA. Located in Wrangell-St. Elias National Park and Preserve in the US state of Alaska, the glacier is part of the Bagley Icefield, which is recognized as the largest of its kind outside of the polar regions of North America. First reported in a post on this website, this hulking brute of a monolith lies hidden among the bushes in a tranquil-appearing subdivision.… The boulder at the top of this trail is the largest known glacial erratic among the hundreds found in the Willamette Valley.Caption 1This large glacial erratic, composed of a metamorphic rock called argillite, was once much larger! The northern portion of the town of Waterville, Washington has a large number of large basalt erratics , particularly along the moraine running east-west from McNeil Canyon. Old postcard views of boulders; most are glacial erratics in the Northeast. A large glacial erratic. New Boston, Hillsborough Co., New Hampshire, USA. One of the largest examples of a Sioux Quartzite erratic is known as Pilot Rock and is seen about three miles south of Cherokee, perched above the eastern edge of the Little Sioux River valley — doubtless an important landmark for early travelers through the area. Imagine a when gigantic icebergs floated across the broad-shouldered Willamette Valley.