They are probably due to downward percolation of calcite-rich water and precipitation of calcite in the siltstone along fractures during a long period of soil development and erosion of the overlying Whitney and possibly younger rocks.
(They; are probably; due to downward percolation of calcite-rich water and precipitation of calcite in the siltstone along fractures during a long period of soil development and erosion of the overlying Whitney and possibly younger rocks)
They
are probably
due to downward percolation of calcite-rich water and precipitation of calcite in the siltstone along fractures during a long period of soil development and erosion of the overlying Whitney and possibly younger rocks