Which of these is still affecting north america geologically, although it ended 10,000 years ago?

a. an earthquake

b. the last glaciation

c. a major subsidence

d. chemical erosion of the grand canyon

What does the word submerged mean in the following sentence? after it rained for three days in a row, the streets were completely submerged.

The rocky mountain system stretching from canada to new mexico is a string of mountains running along the wester united states. what factors would mostly cause this arrangement of mountains? intense pressure undemeath a tectonie plate that could not breakthrough the rock subduction of a tectonic plate, which pushed up a neighboring plate into mountains two plates located at a diverging boundary with a third plate rising between them two plates that melted into molten rock, which later cooled into the shape of mountains

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic