Regression here refers to the marine regression, which can be simply defined as a distinct geological process that takes place when someparts of submerged ocean-floor are revealed above the elevation of the mean sea.
This results in the shifting of the coastal region towards the sea and it often occurs due to the tectonic movements, isostatic adjustment, and orogenic upliftment.
They are not caused due to the increasing climatic condition and melting of the ice sheets.
a. They are not typically well preserved in the sedimentary record.
Explanation:
Marine regression is a geologic process that occurs in areas of the submerged seafloor that are exposed to the sea levels.
The transgression and regression of the sea have led to various extinctions, in the Permian and the Triassic age and has been linked to slow down the seafloor spreading.
Also associated with the variation in sea floor topography.
The tilt of the Earth's AXIS is the most important reason why seasons occur. We have hot summers and cold winters because of the tilt of the Earth's axis. The tilt of the Earth means the Earth will lean towards the Sun (Summer) or lean away from the Sun (Winter) 6 months later.
