What is the shape of a glacial valley?
GeologyValley glaciers carve U-shaped valleys, as opposed to the V-shaped valleys carved by rivers. During periods when Earth’s climate cools, glaciers form and begin to flow downslope. Often, they take the easiest path, occupying the low V-shaped valleys once carved by rivers. What is V-shaped valley? BSL Geography Glossary – V-shaped Valley – definition A
Is the earth’s crust denser than the mantle?
GeologyThe crust, with an average density of around 2.6 grams per cubic centimeter (g/cm3), is less dense than the mantle (average density of approximately 3.4 g/cm3 near the surface, but more than that at depth), and so it is floating on the “plastic” mantle. Is the continental crust denser than the mantle? Both oceanic crust
Is Basalt a natural stone?
GeologyBasalt tiles are a volcanic natural stone used in architecture for centuries. Basalt is a solid stone and offers a very homogeneous color distribution. Is basalt rock natural? Basalt is the most common volcanic rock type on Earth, making up over 90% of all volcanic rock on the planet. The crustal portions of oceanic tectonic
What geologic features are formed through each type of plate boundaries?
GeologyDeep ocean trenches, volcanoes, island arcs, submarine mountain ranges, and fault lines are examples of features that can form along plate tectonic boundaries. Volcanoes are one kind of feature that forms along convergent plate boundaries, where two tectonic plates collide and one moves beneath the other. What geological features are created at convergent divergent and
What is phyllite used for?
GeologyPhyllite is a foliated metamorphic rock rich in tiny sheets of sericite mica. Phyllite is a durable and soft rock and used as decorative aggregates, floor tiles, and as exterior building, or facing stone. The other uses include cemetery markers, commemorative tablets, creative artwork, and writing slates. What are the uses of metamorphic rocks? Metamorphic
What are the main causes of mass movement?
GeologyGravity is the main force responsible for mass movements. Gravity is a force that acts everywhere on the Earth’s surface, pulling everything in a direction toward the center of the Earth. What are the 3 factors that cause mass movement? Such factors include: weathering or erosional debris cover on slopes, which is usually liable to
What mineral can scratch halite?
GeologyOn the Mohs Hardness Scale of 1 to 10, rock salt is a 2.5, which means it is a very soft mineral that is approximately the same hardness as your fingernail. You can scratch salt with a copper penny, pocketknife or steel file. Can you scratch halite? The short answer is no, halite will not
In what environment do stromatolites form today?
GeologyModern stromatolites are mostly found in hypersaline lakes and marine lagoons where extreme conditions due to high saline levels prevent animal grazing. One such location where excellent modern specimens can be observed is Hamelin Pool Marine Nature Reserve, Shark Bay in Western Australia. How and where do stromatolites form today? Stromatolites, also known as layered
What color is granitic magma?
GeologyGranitoid is a general, descriptive field term for lighter-colored, coarse-grained igneous rocks. Petrographic examination is required for identification of specific types of granitoids. Granites can be predominantly white, pink, or gray in color, depending on their mineralogy. What is the color of magma? Lava (magma that has erupted onto the Earth’s surface) is visually mesmerizing
How are synclinal mountains formed?
GeologySynclines are formed when tectonic plates move toward each other, compressing the crust and forcing it upward. What is a synclinal mountain? What is a synclinal mountain? A synclinal mountain is where the geological structure is down-folded sedimentary rock, but the topography you see in the land is not a valley. Instead, a mountain occupies