Sorry it took me so long to see that you responded! I looked up the elevations of cities in Montana and it looked like the minimum was 2000 ft. This implies th

Sorry it took me so long to see that you responded! I looked up the elevations of cities in Montana and it looked like the minimum was 2000 ft. This implies that we've seen more change due to plate tectonics than the 750 ft (generous) sea level change. [0] Granted, to really resolve the argument on the shark's tooth we'd have to know how deep that shallow sea was in the Cretaceous Period. On the positive side, even if sea levels rose 750 ft now, Montana wouldn't be underwater. :) [0] http://www.open.edu/openlearn/ocw/pluginfile.php/69982/mod_oucontent/oucontent/522/05884163/5a6419c8/sxr260_1_004i.jpg http://www.open.edu/openlearn/ocw/pluginfile.php/69982/mod_o...