on April 16, 2022
What color is plagioclase feldspar?
GeologyPlagioclase Feldspar Physical Properties Color Usually white or gray. Also colorless, yellow, orange, pink, red, brown, black, blue, green. Streak White Luster Vitreous. Pearly on some cleavage faces. Cleavage Perfect in two directions that intersect at approximately 90 degrees. Diaphaneity Translucent to transparent What does plagioclase feldspar look like? Physical Properties of Plagioclase Minerals These
on April 16, 2022
How are island chains formed?
GeologyAn island chain is formed when Earth’s plates move over a hot spot. Magma is pushed through the plate and creates an underwater volcanic mountain. The mountain grows and forms an island. How can an island chain be formed by tectonic plates? The Hawaiian Islands were formed by such a hot spot occurring in the
on April 16, 2022
When was the last major earthquake in Australia?
GeologyList of earthquakes State(S) Location Date Victoria Gippsland 2012-06-19 Queensland Coral Sea 2015-07-30 Northern Territory MacDonnell Region 2016-05-20 Victoria/New South Wales/Tasmania/South Australia Mansfield, Victoria 2021-09-22 When was the most recent earthquake in Australia? Australian National Recent Earthquakes Time (UTC) Time (AEST) Near 15 Apr 00:34:25 15 Apr 10:34:25 509km WSW of Alice Springs 14 Apr
on April 16, 2022
What are Pyrometric cones used for?
GeologyPyrometric cones are used worldwide to monitor ceramic firings in industrial kilns, pottery kilns, and small hobby kilns where the consistent temperature is important to the quality of the final product being fired. Pyrometric cones measure heat-work, the effect of time, and temperature. What is the purpose of a pyrometric cone in a gas kiln
on April 16, 2022
What was the largest earthquake ever recorded in California?
GeologyCalifornia’s Largest Recorded Earthquakes Since 1800, Ranked by Magnitude Magnitude Date Location 7.9 Jan. 9, 1857 Fort Tejon 7.8 April 18, 1906 San Francisco 7.4 Mar. 26, 1872 Owens Valley 7.4 Nov. 8, 1980 W. of Eureka* Is a 10.0 earthquake possible in California? No, earthquakes of magnitude 10 or larger cannot happen. The magnitude
on April 16, 2022
What mountain range is Pittsburgh in?
Geologythe AppalachiansThe Alleghenies comprise the rugged western-central portion of the Appalachians. They rise to approximately 4,862 feet (1,482 m) in northeastern West Virginia.… Allegheny Mountains States Pennsylvania, Maryland, West Virginia and Virginia Parent range Ridge-and-valley Appalachians Borders on Cumberland Mountains Geology Are there mountains by Pittsburgh? He said that geographically, Pittsburgh is clearly in the
on April 16, 2022
Why are some rocks black?
GeologyBrown, black, or very dark gray rocks may contain large concentrations of organic matter (decayed plant and/or animal matter) and were generally deposited in an environment lacking oxygen. A prime example is coal, but other examples include black and very dark gray shales. What causes rocks to turn black? Iron minerals in rocks deposited in
on April 16, 2022
How does the shape of a stream channel affect flow?
GeologyThe shape and roughness of the channel also affect the velocity of the flowing water. A narrow channel that is V‐shaped or semicircular in cross section results in faster flow; a wide, shallow channel yields a slower flow because there is more friction between the water and the stream bed. How does channel shape affect
on April 16, 2022
What does seismometer mean in geography?
Geologynoun. a seismograph equipped for measuring the direction, intensity, and duration of earthquakes by measuring the actual movement of the ground. What is seismometer in geography? Seismographs are instruments used to record the motion of the ground during an earthquake. They are installed in the ground throughout the world and operated as part of a
on April 16, 2022
What are the two ways of dating fossils?
GeologyThere are two main methods determining a fossils age, relative dating and absolute dating. Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages. What are the two methods of dating? The two main types of dating methods are relative and absolute. Relative dating