Posted on April 17, 2022 (Updated on July 9, 2025)
What process causes volcanoes to form along the Mid Ocean Ridge?
Regional SpecificsIn the ocean, volcanoes erupt along cracks that are opened in the ocean floor by the spreading of two plates called a mid-ocean ridge . Magma from Earth’s upper mantle rises up to fill these cracks. As the lava cools, it forms new crust on the edges of the cracks. What is the cause of
Posted on April 17, 2022 (Updated on July 9, 2025)
How is a river rock formed?
Regional SpecificsHow do rocks form in rivers? The formation of river rocks requires moving water and smaller rocks. Rocks easily eroded by water more likely form river rocks. Typical rocks with jagged edges can fall into the bottom of a river or stream bed or remain on the river bank. The speed of the river determines
Posted on April 17, 2022 (Updated on July 9, 2025)
What type of rock is dolostone?
Regional SpecificsDolostone is a fine-grained sedimentary rock composed primarily of dolomite, a calcium and magnesium carbonate mineral. Dolostone is similar to limestone and is in some cases formed secondarily from chemically-altered limestone. Is dolostone a metamorphic rock? It is the primary component of the sedimentary rock known as dolostone and the metamorphic rock known as dolomitic
Posted on April 17, 2022 (Updated on July 9, 2025)
How big is the crust of earth?
Regional SpecificsThe average thickness of the crust is about 15 km (9 mi) to 20 km (12 mi). Because both continental and oceanic crust are less dense than the mantle below, both types of crust “float” on the mantle. How much of the Earth is crust? 1 percent Regions of the Earth The core forms only
Posted on April 17, 2022 (Updated on July 9, 2025)
Which rocks are best for radiometric dating?
Regional SpecificsIgneous rocks are the best types of rock samples to use for radiometric dating. When igneous rock forms, elements are separated into different minerals in the rock. Thus, when they form, minerals in igneous rocks often contain only a parent isotope and none of the daughter isotope. Which rocks are used in radiometric dating? Most
Posted on April 17, 2022 (Updated on July 9, 2025)
What was the cause of Mount Pinatubo eruption?
Regional SpecificsIn March and April 1991, however, molten rock (magma) rising toward the surface from more than 20 miles (32 kilometers) beneath Pinatubo triggered small earthquakes and caused powerful steam explosions that blasted three craters on the north flank of the volcano. What tectonic plates caused the Mt Pinatubo eruption? Mount Pinatubo lies beneath a devastating