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Obsidian (/ ə b ˈ s ɪ d i. ən, ɒ b-/ əb-SID-ee-ən ob-) [5] is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. [6] Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.
Obsidian is a personal knowledge base and note-taking software application that operates on Markdown files. [3][4][5] It allows users to make internal links for notes and then to visualize the connections as a graph. [6][7] It is designed to help users organize and structure their thoughts and knowledge in a flexible, non-linear way. [8]
Obsidian is a naturally formed volcanic glass that was an important part of the material culture of Pre-Columbian Mesoamerica. Obsidian was a highly integrated part of daily and ritual life, and its widespread and varied use may be a significant contributor to Mesoamerica's lack of metallurgy.
Glass Buttes are a group of volcanic mountains made up of two prominent peaks and several smaller hills. They are located in the remote northeast corner of Lake County between Bend and Burns in central Oregon, United States. Raising high above the high desert plain, the buttes are an important landmark in an area once known as the Oregon's ...
The Cholula archaeological zone is situated 6.4 kilometres (4 mi) west of the city of Puebla, [7] in the city of Cholula. The pyramid is located in the San Andrés Cholula, Puebla municipality, and marks the area in the center of the city where this municipality begins. The city is divided into two municipalities called San Andrés and San Pedro.
Edziza obsidian. Edziza obsidian is a naturally formed volcanic glass found at the Mount Edziza volcanic complex in northwestern British Columbia, Canada. It occurs in at least four geological formations of the volcanic complex and was widely used by indigenous peoples during the pre-Columbian era. As a result of its widespread use, Edziza ...
The Chivay obsidian source (15.6423° S, 71.5355° W, 4972 masl) is the geological origin of a chemical group of obsidian that is found throughout the south-central Andean highlands including southern Peru and western Bolivia. Chemical characterization studies using X-ray fluorescence (XRF) and Neutron Activation Analysis (NAA) have shown that ...
Olorgesailie is a geological formation in East Africa, on the floor of the Eastern Rift Valley in southern Kenya, 67 kilometres (42 mi) southwest of Nairobi along the road to Lake Magadi. It contains a group of Lower Paleolithic archaeological sites. [1] Olorgesailie is noted for the large number of Acheulean hand axes discovered there that are ...