An outcrop of Devonian age Martin Limestone Near Oracle.
An outcrop of Devonian age Martin Limestone in Garden Canyon.
An outcrop of Devonian age Martin Limestone in Nugget Canyon.
The Devonian age Martin Limestone is typically a yellow to grey Limstone which rests unconformably between the Cambrian Abrigo Limestone below, and the Mississippian Escabrosa Limestone above.