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Nookie1986 [14]
3 years ago
8

You are a geologist. While walking in the fog one day, you bang into a cliff. After rubbing your sore nose, you inspect the clif

f, and see what is shown in the picture, in a one-foot-square area. You recognize that this cliff is made of “fossil sand dunes”, with wind-blown sand that was later glued together by hard-water deposits. You are accompanied by a student, who is carrying your tea and crumpets for you. You sketch four arrows on the cliff, label them as shown, and ask the student which of the arrows was pointing up when the loose sand was deposited. Your student is brilliant, and correctly tells you the answer. The arrow that was pointing up when the loose sand was deposited is the arrow that is closest to:
Geography
1 answer:
sweet-ann [11.9K]3 years ago
4 0

may be the way the wind blew? or that that is the way the sand is deposited

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New crust is being produced at a mid-ocean ridge. How does the affect the total size of the crust?
Jet001 [13]

Answer:

The crust size remains constant because the older crust is melted at subduction zones.

Explanation:

The crust is constnatly created on Earth, but the crust is constantly getting destroyed as well. This situation leads to the total size of the crust being roughly at the same level, or rather constant, as one side a new one emerges, while at the same time, on the other side it gets destroyed.

The vast majority of the new crust is formed where there are divergent plate boundaries. Here, a gap opens up between the plates that move away and magma is constantly rising to the surface and creates new crust. When it comes to the destruction of crust, it occurs at subduction zones. Here, one plate moves below another plate, and as it does it reaches the upper mantle where it gets melted and recycled because of the high temperatures and pressure.

3 0
3 years ago
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Silicate-Oxygen tetrahedro

Explanation:

Silicate-Oxygen tetrahedro are the most abundant and basic structure of common minerals.

These are silicate minerals which formed to silicate rock forming mineral. These  constitute about 90% of earth crust. Silica SiO2 consider as most common mineral on the surface of earth also known as Quartz. The the most andundant element in the earth crust is oxygen, mainly found in combine form.

3 0
3 years ago
The ancient trade route that connected Central China to Europe and the Mediterranean was called __________.
Licemer1 [7]
Silk Road I believe.
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3 years ago
AB⎯⎯⎯⎯⎯. AM=2x+9, and AB=8x−50.
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Answer: am equals 11 and ab equals 50÷8

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Just add or divide or multiple or subtract

5 0
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The Milky Way Galaxy contains
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D would be the most reasonable answer.

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