A widely distributed, thin blanket of sediment deposited in a broad, poorly defined drainage.

A sandstone consisting of feldspar and quartz grains cemented by a mixture of quartz and clay minerals.

Sediments deposited by the action of wind.

A magnetic survey conducted from an aircraft.

Silver

Sediments deposited by the action of rivers or streams.

The change in the mineral composition of a rock, commonly due to hydrothermal activity.

A zone in which rock-forming minerals have been chemically changed.

A metamorphic rock composed mainly of the mineral amphibole.

Fold in the form of an arch.