Which feature cause a gap in the geologic record a. extrusion b. fault c. intrusion d. unconformity

A feature known as d. unconformity acts as a cause of gap in geologic record.

An unconformity is the contact between sedimentary rocks that are essentially unique in age or between sedimentary rocks and more seasoned, disintegrated volcanic or transformative rocks. Unconformities act as the cause of the gap in the geologic record.

It occurs for two reasons: silt sediments halted for an impressive time and additionally existing rocks were dissolved before being secured by more youthful residue. It relies upon to what extent disintegration happened or to what extent the deposition stopped.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

this is a good question! i'll do some research and come back when i have the answer!