While observing a sedimentary rock outcrop, you note that majority of the material cemented in the stratigraphic unit is gravel-
cobble in size, but poorly sorted and angular. From these basic observations, what can you infer about the depositional environment represented by the sedimentary characteristics? a) locate in the lower reach of a meandering stream
b) located in a evaporitic, internally drained basin
c) located in a shallow marine environment on the continental shelf
d) located near the headwaters of a mountain reach of a stream
e) located in an estuarian environment
Answer: located in a shallow marine environment on the continental shelf.
Explanation: The illustrations shows that the sedimentary rock outcrop is a Conglomerates. Marine transgression above unconform structures initiates the base of the sequence laid down. They shows shoreline position at a specific time.
The pressure gradient is the force that is produced due to the rotation of earth pressure cells that creates lighter air to move upwards and heavier to move downwards due to the difference in densities of air.
As the air above consists of lighter elements the oceanic air mostly consist of diatomic molecules of oxygen and nitrogen thus containing a large amount of water vapor, all these molecules have a mass that are pulled down by the gravity and this pull of gravity on columns of gas applies a force what we see an atmospheric pressure.
The gas particles and molecules of heavy and denser matter get stuck at the ground, similarly, as the air cools is descends and warm air rises. Thus upwards and downward motion of air causes convergence and divergence of molecules.
