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

Author Question: What kind of sand is on white-sand beaches? Black-sand beaches? Give some details about each type. ... (Read 137 times)

bobypop

  • Hero Member
  • *****
  • Posts: 539
on: Jul 16, 2018
What kind of sand is on white-sand beaches? Black-sand beaches? Give some details about each type.
 
  What will be an ideal response?

Question 2

What is a way humans try to stop beach erosion?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

234sdffa

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: Many white-sand beaches contain mostly quartz. Quartz is abundant in river sediment delivered to the sea because it is the weathering-resistant mineral that is most abundant in continental rocks. Quartz also lacks cleavage, so continuous movement and abrasion by waves do not easily break it. Black-sand beaches are common on basaltic volcanic islands. Basalt does not contain quartz to produce white sand, but the fine-grained igneous rock is crushed into small sand-size grains by wave erosion along the shore.

Answer to Question 2

Answer: By building groins, which are walls built perpendicular to the shoreline, and trap sediment on the upcurrent side to widen a beach. The longshore current erodes the beach, however, on the downcurrent side of the groin.


bobypop

  • Member
  • Posts: 539
Reply 2 on: Jul 16, 2018
Great answer, keep it coming :)

tranoy

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

A lilac, orange and white Satin Peruvian guinea pig (show-length coat) A lilac, orange and white Satin Peruvian guinea pig (show-length coat)
Pacific Black Duck (Anas superciliosa) Pacific Black Duck (Anas superciliosa)
Black Terra Hot Dog Black Terra Hot Dog
Action of type I and type II topoisomerases, as shown by gel electrophoresis Action of type I and type II topoisomerases, as shown by gel electrophoresis
How did you give birth? C section vs. Normal Delivery How did you give birth? C section vs. Normal Delivery
Rock Type Influences Weathering Rock Type Influences Weathering
Video: Krebs cycle : Formation of acetyl coenzyme A and Electron transport chain

For a complete list of videos, visit our video library