Basalt Granite Weathering

Which one among the following minerals is most stable under weathering condition quartz orthoclase feldspar clay mineral biotite clay mineral.

Basalt granite weathering.

This contradiction in goldich s stability series is explained if weathering rinds are produced faster on gabbros than in granite outcrops. Role of plants and organisms in the weathering of rocks 3. It is common both on earth and other planetary bodies. 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.

Basalt weathers faster than granite because it is not as hard and it s easier for outside substances to impact and manipulate its structure. A cap rock is a comparatively more resistant rock that protects the rocks beneath it from weathering and eroding. The types of granite are igneous protolith granite sedimentary protolith granite mantle granite anorogenic granite hybrid granite granodiorite and alkali feldspar granite whereas types of basalt are alkaline basalt boninite high alumina basalt mid ocean ridge basalt morb. Solute fluxes coming from chemical weathering of basalts should be taken into account to estimate global erosion rates.

To date estimates of these fluxes are uncertain. World river average composition data are insufficient because it is difficult to determine the proportion of elements coming from granite or basalt weathering. It is a natural process of in situ disintegration of rocks into smaller fragments and particles through. It forms from lava flows which extrude onto the surface and cool.

In this article we will discuss about 1. The hardness of granite is 6 7 and that of basalt is 6. Basalt is an igneous volcanic rock that forms commonly in oceanic crust and parts of continental crust. Thus the low degree of mineral alteration in gabbro rindlets reflects a shorter time of residence for minerals in this system compared to rindlets on granitic outcrops.

The granite you will see is high up in the la sal mountains and the basalt you will see sits as cap rocks on top of softer underlying sediments. Summary of basalt vs. Hence basalt as a whole also tends to disintegrate faster than granite and other felsic rock types. Types of weathering 2.

Magnetite is one of the most resistant common minerals in basalt and forms the bulk of heavy mineral sands. Among the following which one is likely to be the most stable under weathering condition rhyolite andesite granite basalt granite.