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1987. Mount Monadnock, or Grand Monadnock, is a mountain in the town of Jaffrey, New Hampshire. [3] It is the most prominent mountain peak in southern New Hampshire and is the highest point in Cheshire County. It lies 38 miles (61 km) southwest of Concord and 62 miles (100 km) northwest of Boston. At 3,165 feet (965 m), Mount Monadnock is ...
Mount Monadnock. Mount Monadnock, located in Jaffrey, New Hampshire, has an elevation of 3,166 feet (965 m). Native Americans called the mountain Monadnock, its name meaning “mountain that stands alone”. Thoreau made four trips to Monadnock during his lifetime. His first was in July 1844 and marked the starting point of his solo journey ...
Grand Monadnock. Mount Monadnock, solitary mass of rock (3,165 feet [965 metres]) in Monadnock State Park, southeast of Keene, southwestern New Hampshire, U.S. It is a classic example of, and gave its name to, the geologic feature called a monadnock. Mount Monadnock was celebrated by Ralph Waldo Emerson in the long poem Monadnoc (1846) and was ...
- The Editors of Encyclopaedia Britannica
- Setting The Scene
- Continental Collision
- Mineral Evidence
- Folding
- Erosion
- Glaciers & Today
To begin with, let’s go way back in time. About 415 million years ago, the present-day East Coast of the United States was nonexistent. In fact, the North American continent, at this point named Laurentia, ended just East of Vermont; most of New Hampshire was under an ocean. Across the ocean was a small continent named Avalonia. As Avalonia’s land ...
After approximately 25 million years, Avalonia started to more closely approach the coast of Laurentia. This happened thanks to what is known as a subduction zone. Think of the earth’s surface as a jigsaw puzzle of large pieces of crust called tectonic plates. These tectonic plates do move around, and if two plates jam into each other, the denser o...
Two minerals present in Monadnock’s rocks are sillimanite and garnet. Both of these minerals form under specific heat and pressure conditions, and their presence tells scientists that Monadnock’s rocks were at one point during the Laurentia-Avalonia collision buried at least 12 kilometers (about 7.5 miles) below the surface of the Earth. Today, sil...
Not only were Monadnock’s former seafloor sediments buried deep below the surface of the earth and compressed into rock; the layers were also deformed during the Laurentia-Avalonia continental collision. Think about laying a ream of paper on a table and pushing the edges horizontally towards each other; the paper will soon buckle under the pressure...
Over a long time (and a long time geologically is an extremely long time in everyday terms), many things changed. All of the land in the world, including Avalonia and Laurentia, joined together to create a supercontinent named Pangea, and the large mountains overlying Monadnock’s rocks started to break down and erode away. As this erosion continued...
The most recent major geologic influence to shape Mount Monadnock happened only a few thousand years ago. During the Ice Age, large sheets of ice moved down from the North, slowly working their way up and over the mountain. As they progressed, they smoothed out a sort of ramp on the Northern slope of Monadnock. Looking at many of Monadnock’s bare b...
Aug 30, 2023 · Mount Monadnock is one of the most-climbed mountains in the western hemisphere. In 1914, the Society for the Protection of New Hampshire Forests conserved its first tract of 406 acres on Mount Monadnock, beginning a long-term effort to protect the natural integrity of the mountain and its surroundings. Since then, the Forest Society has ...
The nearest, comparable or higher peak to Mount Monadnock is 48 km (30 miles) away, so it certainly warrants its name. Another translation of Mount Monadnock is ‘the bare or smooth mountain’, no doubt reflecting its bare upper slopes. The local people are the Abenaki tribe of Native Americans. They reside across the north-eastern region of ...
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2.3 mi (3.7 km) Mount Monadnock, or Grand Monadnock, is a mountain in the New England state of New Hampshire. Authors such as Ralph Waldo Emerson and Henry David Thoreau wrote about the mountain, so it is well-known. It is the highest mountain between the White Mountains of New Hampshire and the Massachusetts Berkshires.
