What type of landscape made up most of the land during the Carboniferous period

Characteristic of the Carboniferous period (from about 360 million to 300 million years ago) were its dense and swampy forests, which gave rise to large deposits of peat. Over the eons the peat transformed into rich coal stores in Western Europe and North America. The name "Carboniferous" refers to this coal.

Explanation:

i think the miocene epoch spans the time from 23 million to 12 million years ago.