Search for 444216.98 N 10523.88 W and zoom out to an eye altitude of ∼17 miles. Notice the dep

Name: Problem 39, Chapter 10: Laboratory Manual for Introductory Geology
Uploaded: 2021-10-24T17:27:53-08:00
Duration: 2 min 12 s
Channel: Aflah M
Description: Search for 444216.98 N 10523.88 W and zoom out to an eye altitude of ∼17 miles. Notice the depth of this shallow bay (Arcachon Bay, France). This bay dries out at times and later greatly expands in size daily. What sedimentary structure would you likely find in this area because of this? a. graded beds b. finely layered beds c. cross beds d. mud cracks

step 1 Here, silicous prostitules of diatoms being indestructible, piled up at the bottom of the ocean

Question

Search for $444216.98 \mathrm{~N} 10523.88 \mathrm{~W}$ and zoom out to an eye altitude of $\sim 17$ miles. Notice the depth of this shallow bay (Arcachon Bay, France). This bay dries out at times and later greatly expands in size daily. What sedimentary structure would you likely find in this area because of this? a. graded beds b. finely layered beds c. cross beds d. mud cracks

   Search for $444216.98 \mathrm{~N} 10523.88 \mathrm{~W}$ and zoom out to an eye altitude of $\sim 17$ miles. Notice the depth of this shallow bay (Arcachon Bay, France). This bay dries out at times and later greatly expands in size daily. What sedimentary structure would you likely find in this area because of this?
a. graded beds
b. finely layered beds
c. cross beds
d. mud cracks

Laboratory Manual for Introductory Geology

Bradley Deline,… 2016 Edition

Chapter 10, Problem 39

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Solved by Expert Aflah M

10/24/2021

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The location given is Arcachon Bay, France. Show more…

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Search for $444216.98 \mathrm{~N} 10523.88 \mathrm{~W}$ and zoom out to an eye altitude of $\sim 17$ miles. Notice the depth of this shallow bay (Arcachon Bay, France). This bay dries out at times and later greatly expands in size daily. What sedimentary structure would you likely find in this area because of this? a. graded beds b. finely layered beds c. cross beds d. mud cracks

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Key Concepts

Mud Cracks

Mud cracks are a specific sedimentary structure commonly found in settings where fine-grained sediments, like mud, periodically dry out. As the water evaporates, the sediment contracts and fractures, creating a network of cracks that are preserved in the rock record, indicating episodic exposure and drying.

Sedimentary Structures

Sedimentary structures are features within sedimentary rocks that provide insights into the conditions of deposition. They include a variety of features such as graded beds, cross beds, and mud cracks, each indicating different depositional processes and environmental conditions.

Desiccation Processes

Desiccation refers to the drying out of wet sediments, which leads to volume reduction and cracking. In environments such as tidal flats or seasonal shallow bays, repeated wetting and drying can cause the formation of polygonal mud cracks as the exposed mud shrinks and fractures.

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