Question

You observe a distinct, red sandstone rock body about 50 m thick that is depositionally overlain by a red shale with interbedded gypsum and you follow this boundary in the rock bodies for 1 km until you cross a fault which has displaced the boundary between the two rock bodies. You walk along the fault and see a boundary between a 50 m thick red sandstone and overlying red shale interbedded with gypsum. You conclude ________.

Answer 1

The lower rocks are old while the overlying is newer.

Step-by-step explanation:

• Red sandstone is overlain by a red shale with bedded gypsum sows the age of the rocks. The boundary in the rock bodies for about 1km marks the along the fault displaced the two rocks bodies.

• As 50 meters, thick red sandstone is found it shows the discontinuities in the rocks. The rocks formed at the bottom are oldest and with newer deposits of gypsum.