Boulder is a size descriptor. Others are sand, gravel, cobble. Monolith would be the largest. They are made of rock.
Boulders are typically formed through the process of weathering and erosion. As rocks are broken down by processes such as freezing and thawing, wind, or water, larger pieces can break off to form boulders. These boulders can then be transported and deposited by glaciers, rivers, or landslides.
Boulders that have been carried by a glacier have a couple names, but most commonly they are referred to as glacial boulders or erratics. If you're interested in learning more about glacial boulders, the Iowa Department of Natural Resources has a pretty good article about them; as Iowa and most of the American Midwest were covered by glaciers during the last Ice Age, glacial boulders are fairly common there. http://www.igsb.uiowa.edu/browse/boulders/boulders.htm
Silt is the smallest particle size of boulders, pebbles, sand, and silt. It is finer than sand, pebbles, and boulders, which allows it to settle at the bottom first when suspended in water and has a low settling velocity.
A Boulder, or Talus, Cave is simply an enterable void or set of voids between boulders and the rock-face from which they have fallen. Collapses within existing karst, sea or lava caves may choke the passage or chamber with boulders, and such chambers are often called "boulder chambers", but that does not form the cave, and it is not the same as a true boulder cave.
The material left behind by a retreating glacier, including boulders, sand, clay, and silt, is known as moraine.
a road is mostly made out of tar.
Boulders are typically formed through the process of weathering and erosion. As rocks are broken down by processes such as freezing and thawing, wind, or water, larger pieces can break off to form boulders. These boulders can then be transported and deposited by glaciers, rivers, or landslides.
A boulder is a large rock and can be made up of many different things, including sandstone.
Yes, coarse sedimentary rock can be made up of pebbles or boulders. Coarse sedimentary rocks are formed from the accumulation and cementation of larger grains, such as pebbles and boulders, that are transported by water, ice, or wind. These larger grains are typically found in rocks like conglomerate or breccia.
boulders
New Zealand is the place that has huge round boulders along the beach. These boulders are called the Moeraki Boulders.
The boulders fell from the mountains with a crash! The big boulders hit are car in Indiana.
Moeraki Boulders
Moraine is the accumulation of debris, boulders, stones, etc. carried and deposited by a glacier.
Hoopoes nest in tree-holes, cliffs, boulders, and other cavities.
Alchemy Boulders was created in 1996.
Rockland Boulders was created in 2011.