11 Jun MD BIOLOGY 101 – Describe the hypothesis of sea floor
Question
1…Describe the hypothesis of sea floor spreading (briefly). What is the basic
difference between continental drift theory and the plate tectonics theory?
2…List and briefly describe the three types of plate boundaries?
3… How does ocean crust form along a mid-ocean ridge?
4…Study of depositional environments is critical to understanding Earth history.
Relate these sedimentary rocks (sandstone, shale, limestone) to the general
depositional environment such as beach, lake, wetland, shallow marine oyster shell
beds. How does depositional environmental energy and source material relate to
the sedimentary rock (such as sandstone or shale)?
5…Explain the difference between of relative age dating and absolute (radiometric
age) dating. What are the limitations (if any) of each? If you needed to establish a
date for a fossil of probably Paleozoic Era would you use C-14 methods? Why or
why not?
6… Consider an exposed sedimentary rock formation (such as a shale, limestone,
sandstone layered) on the side of highway, for instance, in Maryland. How does
the regional climate influence weathering of those rocks?
7… What are the three major topographic provinces of the ocean floor? What is
the continental margin? Distinguish between continental margin physiographic
areas: continental rise, shelf and slope. How do the different parts of the ocean
floor (abyssal plain, ocean ridge, ridge flank regions) differ from each other?
9…Briefly, explain the concept of ‘uniformitarianism’ and the principles of lateral
continuity, superposition, and cross cutting relations that allow us to determine the
relative ages of geologic events.
10… What is a fossil? Give examples of three (3) types. What are processes that
can yield (allow development) of fossils? Is the fossil record complete? Why or
why not?
EACH QUESTION HAS TO BE ANSWERED IN TWO PARAGRAPH AND SITE THE SOURCES.
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