1. ________ tells us that older layers of rock occur below younger layers of roc
ID: 288346 • Letter: 1
Question
1. ________ tells us that older layers of rock occur below younger layers of rock.
2. Match each unconformity to its definition:
1. Nonconformity A) Between strata not parallel to each other
2. Disconformity B) Between igneous and sedimentary rocks
3. Angular Unconformity C) Between layers that are parallel to each other
3. What are three types of fossilization processes that preserve body fossils?
4. True or False? A mold is formed when an impression is buried and lithified.
5. In what types of environments are body fossils most likely to occur?
Explanation / Answer
1. Principle of Superposition. It states that younger rocks lie above older rocks if the layers have not been disturbed.
2. Nonconformity- between igneous and sedimentary rocks. A nonconformity exists between sedimentary rocks and igneous rocks when the sedimentary rock lies above and was deposited on the pre-existing and eroded igneous rock
Disconformity- Between layers that are parallel to each other. A disconformity is an unconformity between parallel layers of sedimentary rocks
Angular unconformity - Between strata not parallel to each other.
3. The three types of fossilization processes are .
a. Premineralisation. -- After a bone, wood fragment, or shell is buried in sediment, mineral-rich water moves through the sediment. The water deposits minerals into empty spaces and produces a fossil.
b. Preserved Remains-- It is most uncommon . It is the preservation of the soft tissue original material.
c. Compression - Some fossils form when their remains are compressed by high pressure, leaving behind a dark imprint.
4. False . The mold is formed when the original bone or shell dissolves and leaves behind an empty space in the shape of the material.
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