witchery imdb

The magic door system is a concept that originates from fantasy literature and has found its way into modern video games and entertainment media. It refers to a magical structure or portal that allows characters to travel seamlessly between different locations or dimensions. In literature, magic doors often serve as gateways between the real world and fantastical realms. The concept of a magical door has captured the imagination of readers, as it offers endless possibilities for adventure and exploration. It allows ordinary individuals to step into extraordinary worlds, where they can encounter mythical creatures, discover hidden treasures, or unravel ancient mysteries. In video games, the magic door system is often used to facilitate fast travel between different areas within the game world.

In video games, the magic door system is often used to facilitate fast travel between different areas within the game world. By interacting with a specific door or portal, players can instantaneously transport themselves to a different location, saving time and eliminating the need for lengthy journeys. This mechanic is particularly useful in open-world games, where players may need to revisit previously explored areas or complete quests in different parts of the game world.

felsic and mafic rocks

While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.

Our editors will review what you’ve submitted and determine whether to revise the article.

• Hyperphysics - Felsic Rock

While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.

Our editors will review what you’ve submitted and determine whether to revise the article.

• Hyperphysics - Felsic Rock

Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.

felsic and mafic rocks, division of igneous rocks on the basis of their silica content. Chemical analyses of the most abundant components in rocks usually are presented as oxides of the elements; igneous rocks typically consist of approximately 12 major oxides totaling over 99 percent of the rock. Of the oxides, silica (SiO₂) is usually the most abundant. Because of this abundance and because most igneous minerals are silicates, silica content was used as a basis of early classifications; it remains widely accepted today. Within this scheme, rocks are described as felsic, intermediate, mafic, and ultramafic (in order of decreasing silica content).

In a widely accepted silica-content classification scheme, rocks with more than 65 percent silica are called felsic; those with between 55 and 65 percent silica are intermediate; those with between 45 and 55 percent silica are mafic; and those with less than 45 percent are ultramafic. Compilations of many rock analyses show that rhyolite and granite are felsic, with an average silica content of about 72 percent; syenite, diorite, and monzonite are intermediate, with an average silica content of 59 percent; gabbro and basalt are mafic, with an average silica content of 48 percent; and peridotite is an ultramafic rock, with an average of 41 percent silica. Although there are complete gradations between the averages, rocks tend to cluster about the averages. In general, the gradation from felsic to mafic corresponds to an increase in colour index (dark-mineral percentage).

The fine-grained or glassy nature of many volcanic rocks makes a chemical classification such as the felsic-mafic taxonomy very useful in distinguishing the different types. Silica content is especially useful because the density and refractive index of natural glasses have been correlated with silica percentage; this makes identification possible in the absence of chemical data. For similar determinations, glasses can also be prepared in the laboratory from crystalline rocks.

The influence of silica content on the particular minerals that crystallize from a rock magma is a complex interaction of several parameters, and it cannot be assumed that rocks with the same silica content will have the same mineralogy. Silica saturation is a classification of minerals and rocks as oversaturated, saturated, or undersaturated with respect to silica. Felsic rocks are commonly oversaturated and contain free quartz (SiO₂), intermediate rocks contain little or no quartz or feldspathoids (undersaturated minerals), and mafic rocks may contain abundant feldspathoids. This broad grouping on the basis of mineralogy related to silica content is used in many modern classification schemes.

This article was most recently revised and updated by John P. Rafferty.

Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.

The magic door system also adds an element of mystery and discovery to video games. Players may come across locked or hidden doors that require puzzles to be solved or specific conditions to be met before they can be opened. This encourages players to explore their surroundings, uncover secrets, and engage with the game's world in a deeper way. Outside of literature and gaming, the concept of magic doors has also been incorporated into various forms of entertainment media. Movies, television shows, and stage productions have used magical doors as narrative devices, transporting characters to different time periods, alternate realities, or even parallel dimensions. In conclusion, the magic door system is a fascinating concept that allows characters and players alike to traverse between different locations or dimensions. Whether in literature, video games, or other forms of media, magic doors provide a sense of adventure, mystery, and limitless possibilities..

Reviews for "witchery imdb"

witchery imdb