Assertion: obsidian | /r/HasProperty | formed
Facets:
value: naturally
type: MANNER
value: during the eruption of felsic lavas
type: TEMPORAL
value: from lava
type: CAUSE
value: from quickly cooled lava
type: OTHER
Source sentences:
text: Obsidian is formed from quickly cooled lava, which is the parent material.
text: Obsidian is a naturally formed volcanic glass that was an important part of the material culture of Pre-Columbian Mesoamerica.
text: We have seen in the earlier section that obsidian is an extrusive rock type and formation used to takes place on the surface of the earth when magma or lava coming out due to volcanic phenomena and rapid cooling takes place.
text: Obsidian is formed when flowing water hits a lava source block, and can be found naturally where water from a spring or lake has flowed over a nearby lava pool.
text: In real life, obsidian is an extrusive igneous rock like andesite, meaning that they are both formed from lava that has cooled down.
text: They are formed when felsic lava cools quickly with minimum to no crystal growth.
text: It is formed during the eruption of felsic lavas, which are distinguished by having high concentrations of the chemical element silica.
text: Obsidian can also be formed when the lava flow meets water or solidifies in the air.
text: Obsidian is formed when volcanic lava is cooled down at a fast paste and forms into a crystalline volcanic glass that turns into black, gray, green, blue, and other different colors depending on the location.
text: It is formed during the eruption of felsic lavas, which are distinguished by having high concentrations of the chemical element silica.
text: It is formed from the lava flow from a volcanic eruption and comes in many colors, but black and brown are the most common.
text: When lava cools in a short amount of time, obsidian is formed.
text: Obsidian is a naturally formed volcanic glass that was an important part of the material culture of Pre-Columbian Mesoamerica.
text: Obsidian is a naturally formed volcanic glass that was an important part of the material culture of the Olmec and Maya since the Pre-Classic.....