A geography resource containing map collections is an ??
almanac
atlas
reader’s guide
thesaurus

What structure on the south african coast has a range of 63 km and releases flashes every 30 seconds?

The graph below plots the temperature and luminosity of stars on the main sequence.

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.