on April 14, 2022
What’s an intrusive igneous rock?
Regional SpecificsIntrusive Igneous Rock Intrusive, or plutonic, igneous rock forms when magma remains inside the Earth’s crust where it cools and solidifies in chambers within pre-existing rock. The magma cools very slowly over many thousands or millions of years until is solidifies. What is intrusive igneous rock? Intrusive Igneous Rocks: Intrusive, or plutonic, igneous rock forms
on April 14, 2022
Is Mount okmok active?
Regional SpecificsOkmok is one of the most active volcanoes in the Aleutian island chain (Alaska). It consists of a complex of shields truncated by a caldera and several active vents inside the caldera, which have built small cones and lava flows. Is the Okmok volcano active? The documented eruption of 1945 occurred at a cinder cone
on April 14, 2022
Where does convergence occur?
Regional SpecificsAt the surface, low pressure systems have a counterclockwise rotation in the Northern Hemisphere, with the wind turning slightly inward towards the lowest pressure. This causes air to converge, or come together, at the center of the low near the ground. Where do convergence and divergence occur? The level of nondivergence (LND) is so called
on April 14, 2022
What type of eruption is a cinder cone?
Regional SpecificsCinder cones are the simplest type of volcano. They are built from particles and blobs of congealed lava ejected from a single vent. As the gas-charged lava is blown violently into the air, it breaks into small fragments that solidify and fall as cinders around the vent to form a circular or oval cone. What
on April 14, 2022
What is significant about black smokers for biology?
Regional SpecificsAlthough life is very sparse at these depths, black smokers are the centers of entire ecosystems. Sunlight is nonexistent, so many organisms, such as archaea and extremophiles, convert the heat, methane, and sulfur compounds provided by black smokers into energy through a process called chemosynthesis. What is significant about black smokers for mineral resources? A
on April 14, 2022
How is Richter scale measured?
Regional SpecificsThe Richter scale measures the magnitude of an earthquake (how powerful it is). It is measured using a machine called a seismometer which produces a seismograph. A Richter scale is normally numbered 1-10, though there is no upper limit. How Richter scale is calculated? How is the Richter Scale calculated. The Richter magnitude involves measuring