The Hawaiian Islands are formed on a region of intra plate volcanic activity on the Pacific plate. This region is known as a hot spot. Scientists are not exactly sure what causes this but they do know that a plume of magma rises through the mantle and forces it's way through the crust to form submarine volcanoes and over time volcanic islands.
The magma that rises here originates from the mantle and not crustal melt and so forms basic or basaltic lava.

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2 years ago

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Australia is west of Fiji true or false

inysia [295]

Both Australia and Fiji are located to the South of the Equator, and quite close to each other. Fiji is located more to the North than New Zealand, but it is, just like New Zealand, to the west of Australia, so the statement that Australia is to the West of Fiji is false!

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2 years ago

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.Ice scrapes up a jumble of sediment as it moves across land. Sediments in Heinrich layers are ______. *

cluponka [151]

The sediments located in Heinrich layers contain almost exclusively ice-rafted detritus, known as IRD.

Heinrich layers are layers of sediment in the North Atlantic. These sediments have consist of high amounts of debris in Foraminiferida shells brought by ice. This composition explains how these layers function as a historical record of major ice releases.

These layers are formed from huge releases of ice of the Hudson Strait ice stream. The North Atlantic cores of sediment found in these layers are badly sorted and lack almost any foraminifera, being composed of primarily ice-rafted detritus (IRD).

These IRDs are described as sediments of no particular size that are carried by floating ice until they are introduced into the water and mix into the environment. This Ice carries debris located within it in the way a raft would carry a person, by allowing it to float on the surface of the water

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1 year ago