In geology, a dike or dyke is a sheet of rock that is formed in a fracture of a pre-existing rock body. Dikes can be either magmatic or sedimentary in origin. Magmatic dikes form when magma …

dike, in geology, tabular or sheetlike igneous body that is often oriented vertically or steeply inclined to the bedding of preexisting intruded rocks; similar bodies oriented parallel to the …

It is a type of tabular or sheet intrusion, that either cuts across layers in a planar wall rock structures, or into a layer or unlayered mass of rock. A dike (or dyke) is a sheet-like body of …

2020年1月17日 · What Are Dikes and How Do They Form? Andrew Alden is a geologist based in Oakland, California. He works as a research guide for the U.S. Geological Survey. A dike …

2024年6月10日 · A dike is a sheet of rock that formed in a fracture in a pre-existing rock body. Dikes can be either magmatic or sedimentary in origin. Magmatic dikes form when magma …

RHYOLITE DIKES (EOCENE)—Tan-weathering aphanitic to very fine-grained phaneritic rock that contains variable amounts of bipyramidal quartz and euhedral feldspar phenocrysts. …

Dike. Dikes are vertical or steeply dipping intrusive igneous bodies that form when magma intrudes into cracks in the rock. Dikes are discordant plutons, meaning they cut across pre …

2024年4月29日 · A dike is a barrier used to regulate or hold back water from a river, lake, or even the ocean. In geology, a dike is a large slab of rock that cuts through another type of rock.

A dike (also spelled dyke) is a sheet tabular intrusion that crosscuts preexisting country rocks. In the vast majority of cases, a dike consists of igneous rocks. However, sedimentary processes …

A dike is a sheet of rock that formed in a fracture in a pre-existing rock body when magma intrudes into a crack then crystallizes as a sheet intrusion, either cutting across layers of rock …