Many of Kilauea's pre-1924 explosive eruptions that produced significant ash deposits probably happened when the volcano's summit crater was so deep that its floor was below the water table, letting groundwater seep in to form a lake. Whenever magma erupted into the lake water, violent explosio...
Igneous rocks are made from magma from the earth’s core or other rocks that have melted, crystalized, cooled, and hardened. Some examples of igneous rocks are basalt, pumice, and granite. What are Sedimentary Rocks?Sedimentary rocks are made up of sediment, small pieces of rock that have b...
Sedimentary rocks form when sediment is compressed and cemented into a solid piece of rock. Metamorphic rocks form when heat and pressure force the crystals in existing rocks to realign.Answer and Explanation: Igneous rock is formed when magma cools. Magma is melted rock found below the surface ...
Interesting Conglomerate Facts: Conglomerate is closely related to sandstone and displays many of the same types of sedimentary structures. What do you call cooled lava? Lava rock, also known as igneous rock, is formed when volcanic lava or magma cools and solidifies. It is one of the three...
What happened to create an nonconformity? What happened to create an unconformity?The older strata below were eroded before the younger layers were laid down. What causes igneous intrusions? Igneous intrusions formwhen magma cools and solidifies before it reaches the surface. ...
When we look to see how the Pacific Plate has moved steadily north, we’d expect to find evidence of the past equatorial line of sediment to the north. But scientists have been surprised to find something unexpected: the equator was not where we’d expect–and the only way that the equat...
The process, called relamination, starts at the edge of a continental plate, where an oceanic plate is diving under the continental plate and magma is rising to form a volcanic arc. As the oceanic plate dives, it drags down sediment, lava and plutonic rock from the edge of the arc. ...
The crust is the uppermost of the earth's three layers. The other layers are the mantle and the core. It is the coolest of all the layers of the earth. It is solid because of the low temperatures and pressures which are present in it. ...
Oceans of magma, Moon formation and Earth’s ‘Year Zero’ Posted onAugust 12, 2016byRon Miksha Interesting piece by Steve Drury on the attempts to define Earth’sYear Zero. Accuracy of a new model narrows the date to a rather narrow window. Reblogged onThe Mountain Mysterysite. ...
The magma creates a new section of sea floor, which explained why the oceanic crust looked so young: It was continually emerging as a new floor. The newest rock was closest to the mountain range, with older rock located farther away, and each new layer reversed the magnetic polarity, explai...