Feldspar-rich Sandstone: Formation and Conditions

What conditions could lead to a feldspar-rich sandstone?

What are the factors related to climate, weathering rate, and erosion rate that promote the formation of feldspar-rich sandstone?

Answer:

Feldspar-rich sandstone is most likely to form in a dry climate with slow weathering rates and rapid erosion rates. These conditions preserve feldspar and replenish the supply, leading to a feldspar-rich sandstone.

Explanation: Feldspar-rich sandstone could form under conditions of a dry climate, slow weathering rates, and rapid erosion rates. A dry climate would slow the weathering of feldspar to clay and prevent its removal by water. Slow weathering rates also contribute to the preservation of feldspar, as the transformation of feldspar to clay takes time. Furthermore, rapid erosion rates could lead to frequent deposition of fresh feldspar, replenishing the supply and leading to a feldspar-rich sandstone.