In triangles CDE and QRS below, mZD=mZR = 90°, CD QR, and CE QS.
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Select the natural regions. delta denver forest georgia north america plateau stream

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.

What is the largest river in the united states?