h. Where would you expect the greatest thickness of late Cretaceous...

  1. Home
  2. Homework Library
  3. Earth Science
  4. Geology
  5. h. Where would you expect the greatest thickness of late Cretaceous...


Transcribed TextTranscribed Text

h. Where would you expect the greatest thickness of late Cretaceous sediments to have accumulated? Explain your reasoning. Part 2 The map in Figure 4 shows both rock types and thicknesses for lower Silurian rocks in the eastern U.S., including the eastern part of Iowa. This is a combination facies and isopach map. a. Where is the most likely source area of lower Silurian siliciclastic rocks shown in Figure 4? What kind of topography probably existed in this source area? NY WI (Conglomerate Limey shale IA PA, IL OH IN o Fossiliferous limestone Shaly sandstone MO VA KY (00) NC TN GA sc AL MS Figure 4 -Facies and isopach map of lower Silurian rocks in eastern U.S. Isopach contours represent rock thickness, which reaches 400 ft in Pennsylvania, and -1000 ft in a few places within the 400 ft contour (from Brice et al. 2001). b. Construct a lithologic cross section by drawing lines from column to column connecting equivalent lithofacies. [Do not drow lines to connect time lines, but use the time lines to help guide your lithologic correlations from column to column.] Once your cross section is complete, answer the following questions: c. Are the conglomerates the same age at each of the different localities where they occur? d. If not, does the age of the conglomerates vary in a consistent pattern from east to west? How? 4-12 e. What trend is visible in the sandstone beds as they are traced from east to west? f. The shale beds become thinner as they are traced from west to east. How can you explain this pattern? 9. Where and what is the most likely source of the siliciclastic sediments that are now preserved as rock? What was the direction of transport? 2 3 4 5 6 7 a Datum-Elevation 2500 feet 8 f 8 f f r . . e e d d d d € b e 6 b b b . . Meters Feet 500 1500 Hamilion 400 Palle Buffalo, without Ithaca, 300 1000 NEW YORK Canstill Brie, Elmina Binghanton a .13 14 15 9 to 11 121 200 500 PENNSYLVANIA Seranton 100 Yoongatown Willamsport 2 a . - (NEW JERSEY] Figure a (oont.) = = = .

Solution PreviewSolution Preview

These solutions may offer step-by-step problem-solving explanations or good writing examples that include modern styles of formatting and construction of bibliographies out of text citations and references. Students may use these solutions for personal skill-building and practice. Unethical use is strictly forbidden.

Page 12
Part 5

a-b. (already attached)

No, the conglomerates are not all the same age at the different localities. You can see from the
times lines that the conglomerate occurs during different time intervals.

The conglomerates do vary in a consistent pattern; they are younger moving westward.

The sandstone beds are thinner moving from east to west. (Thinner to the west.)

The shales become thinner to the east because the east side of the cross-section was closer to the...

By purchasing this solution you'll be able to access the following files:

for this solution

PayPal, G Pay, ApplePay, Amazon Pay, and all major credit cards accepted.

Find A Tutor

View available Geology Tutors

Get College Homework Help.

Are you sure you don't want to upload any files?

Fast tutor response requires as much info as possible.

Upload a file
Continue without uploading

We couldn't find that subject.
Please select the best match from the list below.

We'll send you an email right away. If it's not in your inbox, check your spam folder.

  • 1
  • 2
  • 3
Live Chats