Which of the sedimentary structures below is most useful in telling earth\'s lif

Question

Which of the sedimentary structures below is most useful in telling earth's life history and evolution? fossils ripple marks graded bedding cross-bedding Which of the following sedimentary rocks is biochemical (bioclastic) in origin? bituminous coal limestone both A & D coquina Approximately what percentage of the earth's crust is composed of sediment and sedimentary rocks? 75 15 5 95 This nonfoliated metamorphic rock is actually a clean -burning fossil fuel. marble anthracite coal hornfels slate Which of the following metamorphic texture - metamorphic rock pair is INCORRECT? schistosity - mica schist porphyroblastic - garnet-mica schist slaty cleavage - marble gneissic banding - gneiss Which of the factors below is LEAST relevant to the metamorphism of a pre -existing rock? heat age of original rock parent rock composition pressure

Explanation / Answer

45) fossils

Fossils are know to present on earth since last 2 by so their inclusion in a rock can tell some history about that rock as well as the earth's history

46) both a and d

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