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Earth Materials Formative Asessment. 1. What is the name of a clastic sedimentary rock with a grain size between silt and gravel? 2. What is the name of a nonfoliated metamorphic rock that reacts with HCl?.
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1. What is the name of a clastic sedimentary rock with a grain size between silt and gravel?2. What is the name of a nonfoliated metamorphic rock that reacts with HCl?
3. A rock has an age of 520 mya. From what geologic time era is this rock?4. Is coal a mineral, sedimentary rock, or igneous rock?
5. What is the texture and composition of granite?6. A layer of mud becomes rock and then is found on the surface of the ground? What 4 processes must occur in order for these events to occur?
7. A rock contains a trilobite and crinoid. What type/class of rock is it?8. A mafic, extrusive igneous rock is observed in an outcrop. What can you hypothesize about the past geologic history that formed it?
9. A limestone with Tertiary fossils is observed in an outcrop. In what physiographic province was it deposited?10. A geologist interprets a rock strata to be a river channel deposit. What likely name would the rock have?
ANSWERS Sandstone Marble Paleozoic Sedimentary rock Intrusive / Felsic Deposition – Burial – Uplift – Erosion Clastic Sedimentary rock Volcanism Coastal Plain Conglomerate