What do you mean by exogenic and endogenic forces?
GeologyThe forces which derive their strength from the earth’s exterior or originate within the earth’s atmosphere are called exogenic forces or external forces. While the endogenic forces, also called internal forces, are used to describe pressure that originates inside the earth. What do you mean by exogenic and endogenic forces Class 7? Exogenic forces are
What kind of eruption produces pahoehoe and AA?
GeologyOnce the volcanic vent rises above sea-level, phreatomagmatic eruptions become rare and effusive eruptions resume (Figure 4C). Pahoehoe and aa are the important lava types, and in most cases a lava shield is created from numerous low-relief lava flows. What type of volcano produces pahoehoe? Pahoehoe is a smooth, ropy lava, common on the Hawaiian
Where is scoria found in the world?
GeologyScoria is common in areas of recent volcanism, such as the Canary Islands and the Italian volcanoes. It is relatively low density due to its vesicles, bu it is not as light as pumice. Also differs from pumice in that it has larger vesicles with thicker walls. Where does scoria come from? Scoria forms when
What is the protolith of marble?
GeologyLimestoneLimestone is a protolith for marble. What is the parent rock for a marble? Marble Type Metamorphic Rock Metamorphic Type Regional or Contact Metamorphic Grade Variable Parent Rock Limestone or Dolostone Metamorphic Environment Variable grade regional or contact metamorphism along a convergent plate boundary What is rock protolith? The original rock that has undergone metamorphism
What is an igneous rock with large crystals?
GeologyAn igneous rock with large crystals probably indicates that the rock formed deep within the Earth, since it is typically warmer deep inside the Earth than near the surface. These are called intrusive rocks, and they have a phaneritic texture (from the Greek “phanerous” meaning visible). What is an igneous rock with large crystals called?
Which is thicker continental crust or oceanic crust?
GeographyEarth’s crust is generally divided into older, thicker continental crust and younger, denser oceanic crust. The dynamic geology of Earth’s crust is informed by plate tectonics. Is the continental crust the thickest crust? What’s the thickest crust? At 25 to 70 km, continental crust is considerably thicker than oceanic crust, which has an average thickness
What was the cause of the San Francisco earthquake 1906?
GeologyThe quake was caused by a slip of the San Andreas Fault over a segment about 275 miles long, and shock waves could be felt from southern Oregon down to Los Angeles. San Francisco’s brick buildings and wooden Victorian structures were especially devastated. What fault caused the San Francisco earthquake of 1906? the San Andreas
What do you mean by karst topography?
Geology[ kärst ] A landscape that is characterized by numerous caves, sinkholes, fissures, and underground streams. Karst topography usually forms in regions of plentiful rainfall where bedrock consists of carbonate-rich rock, such as limestone, gypsum, or dolomite, that is easily dissolved. Why is it called karst topography? The term Karst was adopted by all the
What kind of Paleoenvironment is characteristic of the Tippecanoe sequence?
GeologyWhat kind of paleo-environment is characteristic of the Tippecanoe sequence? Near-shore sandstone environment. Which orogenic processes affected the Absaroka sequence? Which orogenic processes affected the Absaroka sequence? The Appalachian orogeny to the east and the Ouachita orogeny to the south. How long did the Sauk sequence last quizlet? How long did the Sauk sequence last?
What happened Lake Nyos?
GeologyOn 21 August 1986, a lethal carbon dioxide (CO2) cloud burst from the bottom waters of Lake Nyos in northwestern Cameroon, killing 1746 people and more than 3000 livestock. What happened in the Lake Nyos disaster? On August 21, 1986, a rare natural disaster occurred in the West African country of Cameroon when a large