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
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
Where did the word marble come from?
Geology questionsThe word “marble” derives from the Ancient Greek μάρμαρον (mármaron), from μάρμαρος (mármaros), “crystalline rock, shining stone”, perhaps from the verb μαρμαίρω (marmaírō), “to flash, sparkle, gleam”; R. S. P. Beekes has suggested that a “Pre-Greek origin is probable”. Where did the marble came from? Marble forms when sedimentary limestone is heated and squeezed by
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
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
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
Which type of volcano has side vents?
GeologyStratovolcano. Stratovolcanoes have relatively steep sides and are more cone-shaped than shield volcanoes. They are formed from viscous, sticky lava that does not flow easily. The lava therefore builds up around the vent forming a volcano with steep sides. Which volcano has a side vent? Nyiragongo volcano (DR Congo): side vent inside crater again active,
What is the most recent eon?
Geologythe Phanerozoicthe Phanerozoic, which began about 540 million years ago. This eon is very distinct from the previous three—the Hadean, Archean, and Proterozoic—which are sometimes known as the Precambrian era. What are the 4 eons in order? For example, the entire age of the earth is divided into four eons: the Hadean Eon, the Archean
Where are subduction zones?
GeologySubduction zones occur all around the edge of the Pacific Ocean, offshore of Washington, Canada, Alaska, Russia, Japan and Indonesia. Called the “Ring of Fire,” these subduction zones are responsible for the world’s biggest earthquakes, the most terrible tsunamis and some of the worst volcanic eruptions. What plates have subduction zones? Only oceanic plates, which
What are the 8 properties used to identify minerals?
GeologyMost minerals can be characterized and classified by their unique physical properties: hardness, luster, color, streak, specific gravity, cleavage, fracture, and tenacity. What are the 10 mineral properties? These include: color, streak, hardness, luster, diaphaneity, specific gravity, cleavage, fracture, magnetism, solubility, and many more. These physical properties are useful for identifying minerals. What are the