Microfossils 0.0 / 5 ? GeologyF795A2/A-levelOCR Created by: Maria5Created on: 28-05-17 21:49 365241 Across 1. Microfossils are good at dating rocks because they are good... (4, 7) 6. Complex crustaceans, similar to bivalves which are less than 2mm in length (9) Down 2. Marine planktonic animals composed of silica and occupied niches near the surface to hundred metres depth (10) 3. Simple single celled creatures with a protective shell, most forms are benthonic (12) 4. Teeth from a soft bodied creature. The earliest are found in Precambrian rocks and died out in the Permo-Triassic extinction (9) 5. Composed of sporopollenin (6, 3, 6)
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