Answer: Sedimentary rocks make up 75 percent of the rocks at the earth's surface but only 5 percent of the outer 10 miles of the earth. Sediment, as distinguished from sedimentary rock, is a collective name for loose, solid particles and is generally derived from weathering and erosion of preexisting rock.
The answer is friction. As ocean wave approach the shoreline, they are affected by the sea bed through process such as refraction, shoaling, bottom friction and wave-breaking. However wave breaking also occurs in deep water when the waves re too steep. If the waves meet major structurer or abrupt changes in the coastline, they will be transformed by diffraction.
A magnetic survey can be used to explore for minerals that cannot be seen because the deposit is hidden underground.
<h3>What is Magnetic Survey?</h3>
Magnetic surveying is one of the methods used in archaeological geophysics.
This involves the measurement of and recording of Spartial variations in the earth's magnetic field.
Magnetic survey is also in search for mineral-bearing ore bodies or even oil-bearing sedimentary structures.
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On the geological maps in question, the cratonic basins that contain thick sequences of sedimentary rocks which overly the Precambrian basement, show the <em><u>youngest rocks</u></em> toward the center of the basin.
Geological maps are tools created and used by scientists to show the arrangement of the geological elements of a specific area. This can include:
- Rock types
- Cracks and faults
- Minerals
- Groundwater
- Ages
and much more, depending on the area and detail of the map created.
On a detailed geo-map, we can understand not only the area we are initially standing on but also where to find geological areas with similar sediment compositions and information on the age of the rocks. This is done due to the way the map stacks the units in terms of age, from the <u>youngest </u>at the <em><u>top </u></em>to the <u>oldest </u>at the <em><u>bottom</u></em>.
Cratonic basins are areas where geological elements are widely distributed and often filled with <u>shallow water </u>as well as <u>sedimentary rocks</u>. The rocks at the center of these basins show the <em><u>youngest</u></em> <em><u>rocks </u></em>at the center due to the previously mentioned <u>aging sequence </u>used by the <u>maps</u>.
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I think the answer is A, sorry if its wrong