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Vicki's midterm 1

QuestionAnswer
What is the largest period of time? Eon
Which of the following is an example of a trace fossil? Preserved footprints
What is the most common type of uncomformity? Discomformity
What era are we in now? Cenozoic
What do geologists use to date rock layers? Index fossils
What is a missing rock layer known as? Uncomformity
What is a cavity also known as? Mold
Scientists classify rocks by... Compostion and texture
When sedimentary rock is exposed to heat and pressure, what rock does it become? Metamorphic rock
What is a dark, dense rock known as? Mafic rock
What era lost 90% of its population? Paleozoic
What process forms sediment? Weathering and erosion
What is the theory that states that change happens suddenly? Catastrophism
If magma cools slowly what,type of texture would igneous rock have? Coarse-grained
How is metamorphic rock formed? Heat and pressure
What is a stomach stone called? Gastroliths
What type of rock only forms at a certain temperature? Index minerals
According to the rock cycle, what forms when magma cools? Igneous rock
What is the largest of all intrusive rock formations? Batholiths
What are the three types of sedimentary rock? organic, clastic, and chemical
What is it called when sediment is dropped and layed to rest? Deposition
What does glassy and brilliant mean? Vitreous
When pressure occurs what does foliated rock become? Slate
The splitting of a rock on a smooth, flat surface Cleavage
Created by: victoriaXD
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