crystal

Crystals in aphantic rocks are small in size due to their rapid formation during eruption.
In 1852, fluorite gave its name to the phenomenon of fluorescence, which is prominent in fluorites from certain locations, due to certain impurities in the crystal.
Polygons appear in rock formations, most commonly as the flat facets of crystals, where the angles between the sides depend on the type of mineral from which the crystal is made.
The main effect of extrusion is that the magma can cool much more quickly in the open air or under seawater, and there is little time for the growth of crystals.
The texture of extrusive rocks is characterized by fine-grained crystals indistinguishable to the human eye, described as aphantic.

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Gulf of Aqaba (Wikipedia) The Gulf of Aqaba (Arabic: خَلِيج الْعَقَبَة, romanized: Khalīj al-ʿAqaba) or Gulf of Eilat (Hebrew: מפרץ אילת, romanized: Mifrátz Eilát) is a large gulf at the northern tip of the Red Sea, east of the Sinai Peninsula and west of the Arabian Peninsula. Its coastline is divided among four countries: Egypt, Israel, Jordan, and Saudi Arabia. The northernmost coral reef in the world is situated near the Eilat shore.

see also

mineral

tags

geology