A landscape that is characterized by the features of solution weathering and erosion in the subsurface. These features include caves, sinkholes, disappearing streams and subsurface drainage.
Solid organic substances frequently found in shales. The organic component of an oil shale.
A depression formed in glacial deposits when a buried block of ice, left behind by a retreating glacier, melts.
A lake that forms in a kettle.
A potassium feldspar such as orthoclase, microcline, sanidine or adularia. Also referred to as potash feldspar.
A unit of pressure equal to 1000 bars (the mean atmospheric pressure at 100 meters above sea level is one bar).
A variety of peridotite that is found in volcanic pipes which are thought to be intrusions from the upper mantle. Many diamond deposits are found in kimberlite pipes.
An abrupt change in slope. A point on a stream profile where a change in gradient occurs. This could be caused by a change in underlying bedrock or bedrock structure.
A small hilltop that is round in shape.