17. match the sediment with the appropriate rock name.
more than 95% quartz sand arkose
thinly bedded silt and clay shale
cemented shells greywacke
decomposed and compacted remains of vegetation breccia
20% feldspar and 80% sand lignite
pebble sized angular lasts cemented together coquina
70% sand, 20% silt and clay, 10% feldspar fragments arenite

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.