« previous next »

Author Question: Geologists gain understanding of the formation of magma and igneous rocks by making field ... (Read 26 times)

j.rubin

  • Hero Member
  • *****
  • Posts: 557
on: Jul 16, 2018
Geologists gain understanding of the formation of magma and igneous rocks by making field observations, geochemical analyses, and laboratory experiments. Give an example of each.
 
  What will be an ideal response?

Question 2

Which of the nine igneous rocks shown in Figure 4.3 were formed during last century's eruptions of Mount St. Helens and Mount Pinatubo?
 
  What will be an ideal response?


tanna.moeller

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jul 16, 2018
Answer to Question 1

This is an open-ended question where students may refer to field studies of modern or ancient volcanoes, volcanic rock, and ancient intrusive rock exposed to the surface by erosion; geochemical studies including the identification and measurement of the abundances of elements in igneous rocks; laboratory experiments including melting and/or crystallization studies that mimic the temperature and pressure conditions inside Earth.

Answer to Question 2

Dacite


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

Formation of germ layers. Formation of germ layers.
Rotating Furnace for Making Parabolic Telescope Mirrors Rotating Furnace for Making Parabolic Telescope Mirrors
The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha
Processes of Lightning Formation: Leaders, Strokes, and Flashes Processes of Lightning Formation: Leaders, Strokes, and Flashes
Formation of a bolus Formation of a bolus
Animated Ion formation Animated Ion formation
Video: A timeline of the teeth (Explained - No Audio)

For a complete list of videos, visit our video library