This topic contains a solution. Click here to go to the answer

Author Question: What is the meaning of the half-life of a radioactive-decay process? What will be an ideal ... (Read 49 times)

jjjetplane

  • Hero Member
  • *****
  • Posts: 556
What is the meaning of the half-life of a radioactive-decay process?
 
  What will be an ideal response?

Question 2

What are the three types of unconformities? How does each form?
 
  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

Tonny

  • Sr. Member
  • ****
  • Posts: 341
Answer to Question 1

The time interval during which the number of parent isotopes decreases by half.

Answer to Question 2

Angular unconformity occurs between inclined layered rocks and horizontal rocks.
The missing time includes the period between tilting and eroding the rocks, and deposition of the more horizontal overlying unit.
Disconformities occur in rocks which are all at the same angle (horizontal or inclined), but are represented by a surface of erosion. The time missing includes the period when the sediments were eroded until the overlying unit was deposited.
A nonconformity occurs when sedimentary or volcanic rock overlies crystalline (igneous or metamorphic). The time missing includes the period after the metamorphic rock was formed and ultimately exposed at the Earth's surface until the overlying sediments or lava was deposited.




jjjetplane

  • Member
  • Posts: 556
Reply 2 on: Jul 16, 2018
Great answer, keep it coming :)


mohan

  • Member
  • Posts: 362
Reply 3 on: Yesterday
:D TYSM

 

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

For a complete list of videos, visit our video library