4. In studying an area of tectonic compression, a geologist discovers a sequence of older, less deformed sequence, separated by an angular unconformity. What sequence of plate tectonic processes might have created the angular unconformity? 5. A geologist documents a distinctive chemical signature caused by organisms of the Proterozoic eon that has been preserved in sedimentary rock. Would you consider this chamical sionsture to be a fossil? Why or why not?.