Describe the general pattern of volcanoes found on the continent of Africa. A. The volcanoes appear randomly distributed over most of Africa.
B. Many are found along the Great African Rift valley located in eastern Africa.
C. Many volcanoes form national borders of western and southern African countries.
D. The majority are found within the Sahara Desert region located in northern Africa.

15 points need quick 1. looking at your graph and the geologic time scale during what period did this rock form? what is the age span of the rock, in millions of years? 2. this rock sample is limestone and shale. with what you know about rock formation, what type of environment did these organisms live in? 3. if some of these fossil samples were found in a rock also containing leaf fossils, could you use radiocarbon dating to determine the age of this rock? explain.