What textures are possible in extrusive rocks?
GeologyExtrusive igneous rocks will have aphanitic, vesicular, glassy, or pyroclastic textures. What is the texture of extrusive rocks? Extrusive igneous rocks have a fine-grained or aphanitic texture, in which the grains are too small to see with the unaided eye. The fine-grained texture indicates the quickly cooling lava did not have time to grow large
Where exactly is the San Andreas fault line?
GeologySan Andreas Fault, major fracture of the Earth’s crust in extreme western North America. The fault trends northwestward for more than 800 miles (1,300 km) from the northern end of the Gulf of California through western California, U.S., passing seaward into the Pacific Ocean in the vicinity of San Francisco. Where does the San Andreas
What is converging tectonic plates?
GeologyConvergent (Colliding): This occurs when plates move towards each other and collide. When a continental plate meets an oceanic plate, the thinner, denser, and more flexible oceanic plate sinks beneath the thicker, more rigid continental plate. This is called subduction. What does converging tectonic plates produce? The impact of the colliding plates can cause the
What is Isostasy and what are the important parameters involved?
GeologyIsostasy is the rising or settling of a portion of the Earth’s lithosphere that occurs when weight is removed or added in order to maintain equilibrium between buoyancy forces that push the lithosphere upward and gravity forces that pull the lithosphere downward. What is isostasy in geophysics? Isostasy is a term in geology, geophysics, and
What is viscosity in volcanoes?
GeologyViscosity is the resistance to the flow of a substance. Viscosity is directly related to the amount of silica content. The more viscous the magma the more explosive the volcanic eruption will happen. What is the viscosity of the lava? Thus, basaltic magmas tend to be fairly fluid (low viscosity), but their viscosity is still
Is an example of an igneous rock quizlet?
GeologyAn example of an igneous rock found in continental crustcontinental crustThe lithosphere can be divided into oceanic and continental lithosphere. … Continental lithosphere is associated with continental crust (having a mean density of about 2.7 grams per cubic centimetre or 0.098 pounds per cubic inch) and underlies the continents and continental shelfs. Is an example
How do you calculate air filled porosity?
GeologyThe air-filled soil porosity is the portion of the total porosity of soil containing air. This value is calculated by subtracting the water-filled porosity from the total soil porosity. What is the formula for calculating porosity? Porosity = ( ( Total Volume – Volume of the Solid ) / Total Volume ) x 100%. What
What fault line is Oklahoma on?
GeologyMaggie Koerth-Baker: I think most of us are used to the idea of faults being found at the edges of tectonic plates, but Oklahoma is right in the middle of the North American Plate. What tectonic plate is Oklahoma on? Maggie Koerth-Baker: I think most of us are used to the idea of faults being
What is chalcedony used for?
GeologyChalcedony has the power to soothe self-doubt and bring inner peace to the wearer. It is believed that blue chalcedony helps in calming and centering the emotional energy, while encouraging the wearer to acquire tranquility. Healing: This gem is best for people who have a propensity to get worried easily. What is chalcedony good for?
Where is Parangutirimicuaro?
GeologyWhere is Parícutin located? western Michoacán state Paricutín, volcano, western Michoacán state, west-central Mexico, just north of the Tancítaro Peak and 20 miles (32 km) west-northwest of Uruapan. It is one of the youngest volcanoes on Earth. Where does the word Parangaricutirimicuaro come from? Parangaricutirimicuaro is a town in Mexico frozen forever in volcanic lava.