« previous next »

Author Question: You find fossil horseshoe crabs in a 100-million-year-old rock. You go to the coast and see ... (Read 35 times)

sjones

  • Hero Member
  • *****
  • Posts: 520
on: Jul 16, 2018
You find fossil horseshoe crabs in a 100-million-year-old rock. You go to the coast and see horseshoe crabs living close to the shoreline. What can the principle of uniformitarianism tell you about the environment of deposition of the ancient rock?
 
  What will be an ideal response?

Question 2

Given what you know about convection, consider how global ocean circulation must work if the deep waters in the equatorial regions are known to be cold and surface waters are warm, but the latter cool when transported to cold polar regions.
 
  What will be an ideal response?


CourtneyCNorton

  • Sr. Member
  • ****
  • Posts: 317
Reply #1 on: Jul 16, 2018
Answer to Question 1

You can use observations of how horseshoe crabs live today (shallow-water lifestyle; move to beaches to lay eggs; etc.) to infer the ancient lifestyle and the environment of sediment deposition to form the rock that encloses the fossil.

Answer to Question 2

Surface waters are warmed by the sun. As they near the poles they cool and begin to sink, helping to displace deep water toward the surface where it warms.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

More than 4.4billion prescriptions were dispensed within the United States in 2016.

Fossil and modern stromatolites: evidence of autotrophic cyanobacteria. Fossil and modern stromatolites: evidence of autotrophic cyanobacteria.
The human eye, a product of 600 million years of evolution (Lamb, Collin, & Pugh, 2007). The human eye, a product of 600 million years of evolution (Lamb, Collin, & Pugh, 2007).
How to find the derivatives of inverse trigonometric functions (Part 1) How to find the derivatives of inverse trigonometric functions (Part 1)
How to quickly find the vertex of a quadratic equation that is in standard form How to quickly find the vertex of a quadratic equation that is in standard form
Find angles (in radians) from trigonometric ratio Find angles (in radians) from trigonometric ratio
Find the equivalent replacement payments for the following scheduled payment. Find the equivalent replacement payments for the following scheduled payment.
Video: Protein catabolism - deamination

For a complete list of videos, visit our video library