Cuesta – An asymmetrical ridge, with a long gentle slope on one side conforming with the dip of underlying strata, and a steep cliff like face on the other side formed by the outcrop of resistant beds.

Cyclothem – A series of beds of marine derived sedimentary rocks deposited during cyclic fluctuations in sea level.

Erosion – The wearing away of soil and rock by weathering.

Facies – The aspect, appearance, and characteristic of a rock unit, usually reflecting on the condition of its origin.

Limestone – A sedimentary rock composed of the mineral calcite, derived primarily from marine biologic sources (shell fragments etc.)

Outcrop – A surface exposure of a rock unit, can be natural or man made.

Pennsylvanian – A geologic time period from approximately 320 – to 280 million years ago.

Physiographic - A region in which all parts are similar in geologic and physical structure, and that have similar geomorphic history.

Regression – The retreat of a shoreline during a regional decline in sea level.

Sandstone – A rock composed of cemented sand.

Sea Level – The average elevation of the surface of the sea globally.

Sediment – The detrital material that collates to form sedimentary rocks.

Shale - A sedimentary rock composed of very fine grained (frequently clay and silt sized) sediment that is typically thinly bedded and deposited in still waters near shore.

Topography – The general configuration of a land surface.

Transgression – The advance of a shoreline onto land during a global increase in sea level.