The marcellus shale, which is found at the northern end of the appalachian mountains, was formed during the devonian period. the appalachian mountains did not exist during the devonian period. what did that area look like during the devonian?

What characteristic of the basin that feeds the congo river system affects movement in central africa? a. the center of the basin is a dense rain forest. b. it is the center of ethnic conflict in the area. c. wildlife on the savanna makes it too dangerous to travel. d. the basin is surrounded by desert.