This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Why are ultramafic volcanics rare in rocks that are much younger than Archean in ... (Read 73 times)

jasdeep_brar

  • Hero Member
  • *****
  • Posts: 569
on: Jul 13, 2018
Why are ultramafic volcanics rare in rocks that are much younger than Archean in age?

Question 2

Which statement about caves is false?
 A)They form underwater.
 B)They are formed by deposition of calcium carbonate.
 C)They form naturally and are open to the surface.
 D)The majority of caves are small.
 E)They are commonly found in regions with karst topography.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

leeeep

  • Sr. Member
  • ****
  • Posts: 315
Reply #1 on: Jul 13, 2018
Answer to Question 1

Earth has cooled from its early stages because radiogenic heat production decreased. The Archean near-surface temperatures have not been high enough for ultramafic magma to reach the surface.

Answer to Question 2

B


jasdeep_brar

  • Member
  • Posts: 569
Reply 2 on: Jul 13, 2018
Wow, this really help

AISCAMPING

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

First Camera Trap Photos of Rare Leopard in China First Camera Trap Photos of Rare Leopard in China
During drought years on the Galapagos, small, easily eaten seeds become rare, le During drought years on the Galapagos, small, easily eaten seeds become rare, le
Treating the younger school-age child Treating the younger school-age child
Earth’s history spans 4.5 billion years. Geologists and paleontologists have pieced together the his Earth’s history spans 4.5 billion years. Geologists and paleontologists have pieced together the his
Boys Climbing Rocks And Diving, Tomb Of Hunting And Fishing Boys Climbing Rocks And Diving, Tomb Of Hunting And Fishing
Detrital Sedimentary Rocks Detrital Sedimentary Rocks
Video: A Human Karyotype Preparation Animation

For a complete list of videos, visit our video library