Most geologists involved in almost every phase of field geology use geologic maps. For example, petrologists use these maps to determine the location of possible economic resources, such as metal ores, water, or oil. Ceomor· phologists use such maps to ...
GEO Exploration Hub Latest Questions
A geologic map is actually a form of topographic map, but in this case it shows the type of sediment or rock outcrops exposed at the Earth’s surface, along with the contour lines. The information on these maps can range ...
Jade and serpentine are two important types of minerals that have applications in jewelry and ornamental industries. The key difference between jade and serpentine is that jade is comparatively harder and less scratchy, whereas serpentine is softer and scratches more ...
One major difference between basaltic and granitic magma is their specific mineral contents. Basaltic magma contains between 45 and 55 percent silicon dioxide and is high in magnesium, iron and calcium, while granitic magma contains between 65 and 75 percent ...
These three igneous rocks pretty much have the same chemistry and mineralogy. The are all black or very dark grey. The main difference between them is the grain size. Basalt is fine grained and Gabbro is course grained. This is ...
Marine regression is a geologic event in which areas of the seafloor are exposed above sea level, thus changing the coastline and the corresponding increase in the surface area of emerged land. Regressions can be caused by an actual drop in ...
The continents do not float on a sea of molten rock. The continental and oceanic crusts sit on a thick layer of solid rock known as the mantle. While there is a layer of liquid rock in the earth known ...
Geologists do not use carbon-based radiometric dating to determine the age of rocks. Carbon dating only works for objects that are younger than about 50,000 years, and most rocks of interest are older than that. Carbon dating is used by ...
Minerals or small particles of rocks, become rocks through pressure and temperature, often deep inside the earth’s core, or simply through pressure for instance on the seabed. Wherever many small things become something big it is usually through compression, temperature, or ...
