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

Author Question: Compare and contrast fissure eruptions and pyroclastic sheet ... (Read 28 times)

mspears3

  • Hero Member
  • *****
  • Posts: 586
on: Jul 13, 2018
Compare and contrast fissure eruptions and pyroclastic sheet deposits.

Question 2

Which orogeny was the first pulse of mountain building in the Appalachian mobile belt?
 A)Caledonian
 B)Acadian
 C)Antler
 D)Ouachita
 E)Taconic


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

honnalora

  • Sr. Member
  • ****
  • Posts: 325
Reply #1 on: Jul 13, 2018
Answer to Question 1

During both fissure eruptions and pyroclastic sheet deposits, eruptions issue from long cracks or fissures, cover vast areas, and volcanoes fail to develop.

During fissure eruptions, the lava is so fluid (has such low viscosity) that it spreads out and covers vast areas.

In contrast, it seems that pyroclastic sheet deposits originated as pyroclastic flowshence the name. The pyroclastic materials of many of these flows were so hot that they fused together to form welded tuff. Geologists now think that major pyroclastic flows issue from fissures formed during the origin of calderas.

Answer to Question 2

E


mspears3

  • Member
  • Posts: 586
Reply 2 on: Jul 13, 2018
Excellent

nguyenhoanhat

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

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).

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Heliospheric-current-sheet Heliospheric-current-sheet
Photograph of the skin eruptions associated with shingles. Photograph of the skin eruptions associated with shingles.
A sample flow sheet. A sample flow sheet.
Creating a tent for turning from prone to supine or vice versa. Pin one side of the sheet against ... Creating a tent for turning from prone to supine or vice versa. Pin one side of the sheet against ...
Bar-eye phenotypes in contrast to the wild-type eye in Drosophila Bar-eye phenotypes in contrast to the wild-type eye in Drosophila
Video: Tuberculosis Testing

For a complete list of videos, visit our video library