WebMay 6, 2024 · Large irregular-shaped plutons are called either stocks or batholiths. The distinction between the two is made on the basis of the area that is exposed at the surface: if the body has an exposed surface area greater than 100 square kilometers (km 2), then … Web1. Obsidian exhibits this texture. a. Aphanitic b. Glassy c. Porphyritic d. Phaneritic e. Pyroclastic 2. Rocks that contain crystals that are roughly equal in size and can be identified visually, without the aid of a microscope, are said to exhibit this texture. a. Aphanitic b.
Occurrence, Texture, and Classification of Igneous Rocks
WebJul 30, 2024 · Large, coarsely-crystalline, plutonic bodies, which often form elongated intrusive belts (50–150 km wide and 500–1500 km long). Stocks are smaller structures with a maximum surface area of 100 km 2. Batholiths usually consist of a large number of overlapping, smaller intrusive bodies or plutons (each 5–50 km in diameter). WebJan 11, 2024 · Intrusive igneous rocks have relatively large crystals that are easy to see. Intrusive igneous rocks are also called plutonic. A pluton is an igneous rock body that … shanghai commercial bank logo
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WebJan 11, 2024 · Slow cooling gives crystals a chance to grow. Intrusive igneous rocks have relatively large crystals that are easy to see. Intrusive igneous rocks are also called plutonic. A pluton is an igneous rock body that forms within the crust. Granite is the most common intrusive igneous rock. Pictured below are four types of intrusive rocks (Figure below). WebIntrusive Igneous Bodies: Magma intrudes into country rock by pushing it aside or melting through it. Intrusive igneous bodies tend to be either irregular (stocks and batholiths), tabular (dykes and sills), or pipe-like. Batholiths have exposed areas of greater than 100 km 2, while stocks are smaller. Sills are parallel to existing layering in ... Intrusions are broadly divided into discordant intrusions, which cut across the existing structure of the country rock, and concordant intrusions that intrude parallel to existing bedding or fabric. These are further classified according to such criteria as size, evident mode of origin, or whether they are tabular in shape. shanghai college ranking