on April 2, 2022
How do you know you have Chromite?
GeologyThe most important clue to identifying chromite is its association with ultrabasic igneous rocks and metamorphic rocks such as serpentinite. Chromite is sometimes slightly magnetic. This can cause it to be confused with magnetite. Chromite and ilmenite have very similar properties. What does chromite look like? Chromite is iron-black in color with a metallic luster,
on April 2, 2022
Which represents the correct sequence of the eras of geologic time from oldest to youngest?
GeologyEarth’s history is characterized by four eons; in order from oldest to youngest, these are the Hadeon, Archean, Proterozoic, and Phanerozoic. What are the 4 geological eras in order? The Precambrian, Paleozoic, Mesozoic, and Cenozoic Eras The Geologic Time Scale is the history of the Earth broken down into four spans of time marked by
on April 2, 2022
Which is better marble or quartz?
GeologyIn general, quartz is the more durable of the two materials: it better resists scratches and bacteria and requires less care and maintenance. However, marble does outperform quartz in heat resistance. As an engineered stone created with resin, quartz is not very heat-resistant. What is more expensive quartz or marble? Quartz is less expensive than
on April 2, 2022
How do you study rocks?
GeologyA knowledge of field relationships between different rock units is fundamental to the study of rocks. It is gained from mapping and observing rocks in the field. In depth analysis of rocks using a microscope or sophisticated analytical laboratory equipment provides important information on their composition. How do geologists study rocks? Rocks are made of
on April 2, 2022
How long is the Mid Ocean Ridge?
Geology65,000 kilometers65,000 kilometers (40,390 miles) and with more than 90 percent of the mountain range lying in the deep ocean. How long is the Mid-Atlantic Ridge? about 10,000 miles The Mid-Atlantic Ridge is in effect an immensely long mountain chain extending for about 10,000 miles (16,000 km) in a curving path from the Arctic Ocean
on April 2, 2022
What evidence suggests that continents move?
GeologyThe evidence for continental drift included the fit of the continents; the distribution of ancient fossils, rocks, and mountain ranges; and the locations of ancient climatic zones. What causes continents to move prove it with evidence? The causes of continental drift are perfectly explained by the plate tectonic theory. The earth’s outer shell is composed
on April 2, 2022
How is rhyolite and granite similar?
GeologyGranite is plutonic and rhyolite is volcanic. They have very similar compositions but one is erupted onto Earth’s surface and the other crystallises at depth. As a result, plutonic rocks are coarse-grained and volcanic rocks are fine-grained. How are rhyolite and granite similar and different? Hint: Rhyolite and granite have similar composition. The difference between
on April 2, 2022
What caused the Southern Alps?
GeologyLike the Alpsthe AlpsThe French Alps are the portions of the Alps mountain range that stand within France, located in the Auvergne-Rhône-Alpes and Provence-Alpes-Côte d’Azur regions. While some of the ranges of the French Alps are entirely in France, others, such as the Mont Blanc massif, are shared with Switzerland and Italy. When did the
on April 2, 2022
What is subduction in geology?
GeologySubduction occurs when an oceanic plateoceanic plateOceanic crust is the uppermost layer of the oceanic portion of the tectonic plates. It is composed of the upper oceanic crust, with pillow lavas and a dike complex, and the lower oceanic crust, composed of troctolite, gabbro and ultramafic cumulates. The crust overlies the solidified and uppermost layer
on April 2, 2022
What types of rocks are basalt?
GeologyWhat is Basalt? Basalt is a dark-colored, fine-grained, igneous rockigneous rockIgneous rock (derived from the Latin word ignis meaning fire), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. What type of metamorphic rock