2006-06-27 08:48:26 · 7 answers · asked by Marisha K 1 in Science & Mathematics ➔ Earth Sciences & Geology
No it is not. Oceanic crust is composed primarily of basalt. Basalt is an extrusive igneous rock that cools quickly. Other types of rock commonly found on or beneath the unconsolidated sediments on the ocean floor are sedimentary rocks like sandstone, limestone, and shale.
Granite is found in continental land masses. (Granite is NOT a metamorphic rock.) It is an intrusive igneous rock that must cool very slowly to form granite.
Here is a good explanation with some illustrations:
http://www.athro.com/earth_science/rocks.html
2006-06-27 09:07:21 · answer #1 · answered by carbonates 7 · 0⤊ 0⤋
It's a composite of a lot of different things. Chemicly, it's mostly Silicon and Aluminum, whereas the rock that make up our continents if mostly Silicon and Magnesium. I don't believe granite would be found in any great quantities there. I believe Granite is a metamorphic rock, and would most likely be found in formerly volcanicly active regions. So I'm sure there's some granite, but I doubt it's predominant.
2006-06-27 08:53:52 · answer #2 · answered by Argon 3 · 0⤊ 0⤋
Ocean basin A low part of the lithosphere lying between continental masses. The rocks of an ocean basin are mostly basalt with a veneer of oceanic sediment.
Oceanic ridge A continuous ridge, or broad, fractured topographic swell, that extends through the central part of the Arctic, Atlantic, Indian, and South Pacific oceans. It is several hundred kilometers wide, and its elevation above the ocean floor is 600 m or more. The ridge marks a divergent plate boundary where new oceanic lithosphere is being formed.
The type of crust that underlies the ocean basins. It is generally less than 8 km thick, composed predominantly of basalt and gabbro. Its density is about 3.0 g/cm3. The velocities of compressional seismic waves traveling through it exceed 6.2 km/sec. Compare with continental crust.
GRANITE........
A coarse-grained igneous rock composed of K-feldspar, plagioclase, and quartz, with small amounts of mafic minerals.
2006-06-27 08:59:09 · answer #3 · answered by Carol 3 · 0⤊ 0⤋
I doubt it. You usually find granite, in the deserts, and the like..I believe the ocean floor has more sponges,and corel then anything all types of algae's like plankton, and seeweed, etc....
2006-07-04 05:25:18 · answer #4 · answered by Hmg♥Brd 6 · 0⤊ 0⤋
No, the ocean floor is composed of basalt and other extrusive igneous rocks
2006-06-27 09:05:09 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Is the knowledge that underpins your homework present in your head or is your head granite?
2006-06-27 09:02:36 · answer #6 · answered by Anonymous · 0⤊ 0⤋
The rock is composed primarily of silica and is essentially glass created under high heat and pressure conditions.
2006-06-27 08:53:14 · answer #7 · answered by Anonymous · 0⤊ 0⤋