Obsidian (/ ə b ˈ s ɪ d i. ən, ɒ b-/) is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth.It is an igneous rock.. Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.It is commonly found within the margins of rhyolitic lava flows known as ...

Obsidian Entertainment, Inc. is an American video game developer based in Irvine, California.It was founded in June 2003, shortly before the closure of Black Isle Studios, by ex-Black Isle employees Feargus Urquhart, Chris Avellone, Chris Parker, Darren Monahan, and Chris Jones.. Although they have created original intellectual property, many of their games are sequels …

Obsidian (real name Todd James Rice) is a fictional superhero published by DC Comics.He first appeared in All-Star Squadron #25 (September 1983), and was created by Roy Thomas and Jerry Ordway. He is the son of Alan Scott and Rose Canton and the twin brother of Jade.According to an Infinity, Inc. letter page, Obsidian was named "Todd" after a friend of Thomas.

Etymologie. Der Name leitet sich von dem Römer Obsius her, der in der Antike den ersten Obsidian von Äthiopien nach Rom gebracht haben soll.. Entstehung. Obsidian entsteht bei rascher Abkühlung von Lava mit einem Massenanteil an Wasser von maximal 3–4 %. Bei höheren Gehalten an flüchtigen Stoffen (neben Wasser hauptsächlich CO 2) würde sich sonst, auch bei …

In Māori mythology, as in other Polynesian traditions, Māui is a culture hero and a trickster, famous for his exploits and cleverness. He possessed superhuman strength, and was capable of shapeshifting into animals such as birds and worms.. He was born premature and cast into the ocean by his mother, where the waves formed him into a living baby.

Human sacrifice was common in many parts of Mesoamerica, so the rite was nothing new to the Aztecs when they arrived at the Valley of Mexico, nor was it something unique to pre-Columbian Mexico.Other Mesoamerican cultures, such as the Purépechas and Toltecs, and the Maya performed sacrifices as well and from archaeological evidence, it probably existed since the …

Natürliches Vorkommen. Der harte Obsidian wird im Verlaufe der Umwandlung durch kleine Risse in etwa erbsengroße Glaskügelchen oder -scherben zerlegt und zeigt dann die typische perlitische Struktur. Durch Zutritt von Wasser entlang der Risse setzt eine Entglasung ein, dabei bilden sich aus dem amorphen Glas mikroskopisch kleine Kristalle von Quarz, Cristobalit und Feldspat.

The four-sides model (also known as communication square or four-ears model) is a communication model postulated in 1981 by German psychologist Friedemann Schulz von Thun.According to this model every message has four facets though not the same emphasis might be put on each. The four sides of the message are fact, self-disclosure, Social …

In chemistry and physics, metastability denotes an intermediate energetic state within a dynamical system other than the system's state of least energy.A ball resting in a hollow on a slope is a simple example of metastability. If the ball is only slightly pushed, it will settle back into its hollow, but a stronger push may start the ball rolling down the slope.

Obsidian universe with James Mallory. The world of the Obsidian Mountain, Enduring Flame, and Dragon Prophecy series contains many mythological creatures, and contains several types of magic, each with its own dynamics, strengths, and weakness. The High Magic and Wild Magic are used by the protagonists, while the Dark Magic is an old magic ...