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 ________.
The lower rocks are old while the overlying is newer.
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.
Plague is an infectious disease caused by bacteria called Yersinia pestis. They are found mainly in rodents, particularly rats, and in the fleas that feed on them.
Index fossils, intrustions and cross-cutting relationships.
Explanation:
The correct list of three different geologic features that help scientists determine the relative ages of rocks by their position is "index fossils, intrusions, and cross-cutting relationships".
