Search results
Results from the WOW.Com Content Network
Archaeologists believe the obsidian was likely prized for its quality and color, with different outcrops in the area producing gray-green, green, purple, or blue obsidian. Points derived from Double H Mountain obsidian have been found in other parts of Nevada, evidencing a complex network in the transport of stone tools in the state's ...
The source of obsidian for cultures inhabiting the territory of and around Greece was the island of Milos; the Starčevo–Körös–Criș culture obtained obsidian from sources in Hungary and Slovakia, while the Cardium-Impresso cultural complex acquired obsidian from the island outcrops of the central Mediterranean.
"Imperial Porphyry" from the Red Sea Mountains of Egypt A waterworn cobble of porphyry Rhyolite porphyry from Colorado; scale bar in lower left is 1 cm (0.39 in). Porphyry (/ ˈ p ɔːr f ə r i / POR-fə-ree) is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass.
This member is primarily grayish red in color, but there is a roughly 120 m thick portion of this member made up of basal tuffs that are yellow green to pale red purple in color. [1] This member was originally deposited as flow-banded obsidian with ash-fall tuffs interspersed between obsidian layers. [1]
Confirmation of this formation of mountains is a large number of minerals located on the surface of the Earth. Volcanic tuff, which formed from cemented volcanic ash, can be seen, as well as andesite formed from viscous, soup-like lava, the remains of obsidian lava rich in silica, and bubbly basalt that occurs when the lava cools.
Topographic map. Mount Tsukuba (筑波山, Tsukuba-san) is an 877 m (2,877 ft) mountain located at the northern-end of Tsukuba, Japan.It is one of the most famous mountains in Japan, particularly well known for its double peaks, Nyotai-san (女体山, lit. "female body") 877 m (2,877 ft) and Nantai-san (男体山, lit. "male body") 871 m (2,858 ft).
Lesser quantities of obsidian originated from other sources such as Tajumulco, Ixtepeque and Pachuca. [32] Obsidian is a natural volcanic glass that was used across Mesoamerica to make durable tools and weapons including knives, spearheads, arrowheads, bloodletters for ritual autosacrifice, prismatic blades for woodwork and many other day-to ...
In 2018, evidence dating to about 320,000 years ago was found at Olorgesailie of the early emergence of complex and modern behaviors, possibly associated with early Homo sapiens, including: the trade and long-distance transportation of resources (such as obsidian), the use of pigments, and the possible making of projectile points.