Basalt And Granite Density

Time 120 minutes lesson can be divided into two sessions maintaining the order of the lesson materials per group groups of 4 5.

Basalt and granite density.

Sedimentary rocks and granite which are rich in quartz and feldspar tend to be less dense than volcanic rocks. The tholeiitic and the alkali basalts. Its principle minerals include pyroxene feldspar and olivine. Basalt as a mafic rock contains more calcium oxide manganese oxide and iron compounds than granite.

Learn more about basalt in this article. Granite is a felsic rock meaning that it has a high silicon content. The key difference between basalt and granite is that basalt is mostly occurring on ocean floors while granite is in the crust of the earth in all continents. 6 11 density of granite and basalt lesson concept density of basalt and granite affect the formation of landmasses on earth.

As it turns out most of the ocean floor is basalt and most of the continents are granite. Link mountain formation in lesson 6 10 is dependent upon the density of the crust. Basaltic crust is dark and thin and heavy while granite is light and accumulates. Earth contains three kinds of rocks namely igneous rocks sedimentary rocks and metamorphic rocks basalt and granite are two types of igneous rocks.

Basalts may be broadly classified on a chemical and petrographic basis into two main groups. Basalt is an igneous volcanic rock that forms commonly in oceanic crust and parts of continental crust. Gabbro s density ranges from 2 7 3 3 g cm 3. The trick is to heat the basalt back up again so it can melt and give the iron another shot at the core.

Its high iron content gives it magnetic properties and it may show signs of rust when exposed to air. It wants to be there and heat is the key which unlocks the door. Rock density is very sensitive to the minerals that compose a particular rock type. It is common both on earth and other planetary bodies.

It is mostly made out of quartz mica and feldspar. All rocks of igneous origin consist of magma or molten earth that finds its way up to. Since gabbro and basalt are made of the same minerals their densities are similar. Basalt is an aphanitic fine grained igneous rock that is relatively low in silica and alkali metals it has less than 10 feldspathoid by volume with at least 65 of the rock consisting of feldspar in the form of plagioclase this places basalt in the basalt andesite field of the qapf diagram basalt is further distinguished from andesite by its silica content of less than 52.

And not all granites basalts and gabbros contain exactly the same minerals. It forms from lava flows which extrude onto the surface and cool.