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2. Dike (geology) - Wikipedia

   en.wikipedia.org/wiki/Dike_(geology)

   Dike (geology) A magmatic dike (vertical) cross-cutting horizontal layers of sedimentary rock, in Makhtesh Ramon, Israel. 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 flows into a crack then solidifies ...

3. Sill (geology) - Wikipedia

   en.wikipedia.org/wiki/Sill_(geology)

   Sill (geology) Illustration showing the difference between a dike and a sill. In geology, a sill is a tabular sheet intrusion that has intruded between older layers of sedimentary rock, beds of volcanic lava or tuff, or along the direction of foliation in metamorphic rock. A sill is a concordant intrusive sheet, meaning that it does not cut ...

4. Magna Carta - Wikipedia

   en.wikipedia.org/wiki/Magna_Carta

   Magna Carta Cotton MS. Augustus II. 106, one of four surviving exemplifications of the 1215 text Created 1215 ; 809 years ago (1215) Location Two at the British Library ; one each in Lincoln Castle and in Salisbury Cathedral Author(s) John, King of England His barons Stephen Langton, Archbishop of Canterbury Purpose Peace treaty Full text Magna Carta at Wikisource Part of the Politics series ...

5. 1980 eruption of Mount St. Helens - Wikipedia

   en.wikipedia.org/wiki/1980_eruption_of_Mount_St...

   Map of eruption deposits. On March 27, 1980, a series of volcanic explosions and pyroclastic flows began at Mount St. Helens in Skamania County, Washington, United States. A series of phreatic blasts occurred from the summit and escalated until a major explosive eruption took place on May 18, 1980, at 8:32 am. The eruption, which had a volcanic ...

6. Igneous intrusion - Wikipedia

   en.wikipedia.org/wiki/Igneous_intrusion

   In geology, an igneous intrusion (or intrusive body [1] or simply intrusion [2]) is a body of intrusive igneous rock that forms by crystallization of magma slowly cooling below the surface of the Earth. Intrusions have a wide variety of forms and compositions, illustrated by examples like the Palisades Sill of New York and New Jersey; [3] the ...

7. Magma chamber - Wikipedia

   en.wikipedia.org/wiki/Magma_chamber

   Magma chamber. A magma chamber is a large pool of liquid rock beneath the surface of the Earth. The molten rock, or magma, in such a chamber is less dense than the surrounding country rock, which produces buoyant forces on the magma that tend to drive it upwards. [1] If the magma finds a path to the surface, then the result will be a volcanic ...