The cause could be erosional, tectonic, or man-made, or any combination of them.
Rocks erode because of water flow, usually by rivers. Water dissolves small amounts of the rock's substance, causing it to smooth out.
A rock outcrop is the part of a rock formation that appears above land.
from formation that is pushed out of subsurface by earth movement
Geologists would be interested in outcrops and/or cliffs because sometimes cliffs show the different beds of rock under the Earth's surface. This is easier than drilling into the ground and getting a sample of the rocks.
Sinkholes, cliffs, jagged outcrops of rock, folded strata
Tors are weathered outcrops of rocks that seem precariously balanced due to the erosion of the rock which once surrounded them. Joints and cracks that appeared in the original solid rock were attacked by acidic rainfall and a variety of mechanical weathering. The rock that is visible is that which remained uneroded--for the time being, as eventually these rocks will also weather and erode into sand.
Nahanni National Park Reserve is in the tundra soil region the soil quality - Grey wooded soil with rock outcrops
they were formed when underwater vocaneoes erupted and formed the hawaiin islands
Geologists would be interested in outcrops and/or cliffs because sometimes cliffs show the different beds of rock under the Earth's surface. This is easier than drilling into the ground and getting a sample of the rocks.
In outcrops and cliffs it is possible to see multiple layers of rock exposed in one place, which makes it easier to study a set of rocks.
Correlation.
in rocky outcrops under rocks and in crevices
Rivers,rock outcrops,and slate.
In Colorado, Peregrine Falcons breed on cliffs and rock outcrops.
Mostly on rocky outcrops around both Islands of New Zealand.
Serengeti
Conglomerate and sandstone
You can't any longer. All sources have been depleted by modern flintknappers.
Yes, herkimer diamonds are real herkimer diamonds. From their Wikipedia page: "Herkimer diamond is a generic name for a double-terminated quartz crystal discovered within exposed outcrops of dolostone in and around Herkimer County, New York and the Mohawk River Valley." Chemically, they are different from diamond mineral, which is formed from carbon. Quartz is formed from silica, or silicon dioxide, SiO2, and is a common mineral on earth.
This is mostly as a result of erosion, thereby resulting to the exposure of underground rocks to form outcrops.