Stock (geology) From Wikipedia, the free encyclopedia A stock of nordmarkite (quartz-alkali syenite) of Triassic
Triassic
The Triassic /traɪˈæsɪk/ is a geologic period and system that extends from roughly 250 to 200 Mya (252.17 to 201.3 million years ago), an interval of 51.04 million years. It is the first period of the Mesozoic Era, and lies between the Permian and Jurassic periods. Both the start and end of the period are marked by major extinction events.
Full Answer
What is geology?
Geology is the study of the Earth, the materials of which it is made, the structure of those materials, and the processes acting upon them. It includes the study of organisms that have inhabited our planet.
What is the meaning of stock?
(uncountable, countable) Broth made from meat (originally bones) or vegetables, used as a basis for stew or soup. A necktie or cravat, particularly a wide necktie popular in the eighteenth century, often seen today as a part of formal wear for horse riding competitions. He wore a brown tweed suit and a white stock .
What can I find in the geology store?
General Geology: Articles about geysers, maars, deltas, rifts, salt domes, water, and much more! Geology Store: Hammers, field bags, hand lenses, maps, books, hardness picks, gold pans. Earth Science Records: Highest mountain, deepest lake, biggest tsunami and more.
What do geologists study today?
Geologists study Earth history: Today we are concerned about climate change. Many geologists are working to learn about the past climates of Earth and how they have changed across time. This historical geology news information is valuable to understand how our current climate is changing and what the results might be.
What is a stock in a volcano?
A stock is a remnant of the vent of a volcano or plutonic body with an areal extent less than 40 square miles (or 100 square kilometers). Far below the surface, a large magma chamber will slowly cool to form small plutons and large batholiths.
What is the difference between a batholith and a stock?
Large irregular-shaped plutons are called either stocks or batholiths. The distinction between the two is made on the basis of the area that is exposed at the surface: if the body has an exposed surface area greater than 100 km2, then it's a batholith; smaller than 100 km2 and it's a stock.
Is stock intrusive or extrusive?
Stocks are small igneous intrusions with less than 40 square miles exposed at the Earth's surface.
What is a boss in geology?
Geology. a knoblike mass of rock, especially an outcrop of igneous or metamorphic rock.
What is an example of a stock?
Stock means a share in the ownership of a company. An example of stock is 100 shares of Disney Corporation.
How do batholiths stocks and Laccoliths differ?
How do batholiths, stocks, and laccoliths differ? Batholiths are the largest type of igneous bodies and occur in a linear fashion with a distance of 100km or more; stocks are smaller than batholiths; laccoliths bend the sedimentary layers above them, whereas the sedimentary layers below remain relatively undeformed.
What is a stock in igneous rock?
In geology, a stock is an igneous intrusion that has a surface exposure of less than 100 square kilometres (40 sq mi), differing from batholiths only in being smaller. A stock has a discordant relationship with the rocks that it intrudes. Many stocks are cupolas of hidden batholiths.
Is stock concordant or discordant?
A stock is a small discordant pluton whereas a batholith is a pluton of more than 100 sq. km in outcrop area. A dike is a tabular body of igneous rock cutting across bedding and hence, discordant. A sill is a tabular body which is concordant.
What rock is intrusive?
igneous rockintrusive rock, also called plutonic rock, igneous rock formed from magma forced into older rocks at depths within the Earth's crust, which then slowly solidifies below the Earth's surface, though it may later be exposed by erosion.
How do stocks and batholiths form?
Explanation: A batholith is a large igneous rock formation that forms from cooled magma deep in the Earth's crust Stocks are smaller formations. Both are types of plutons.
What is a Xenocryst in geology?
A xenocryst is an individual foreign crystal included within an igneous body. Examples of xenocrysts are quartz crystals in a silica-deficient lava and diamonds within kimberlite diatremes.
Are stocks discordant?
A stock has a discordant relationship with the rocks that it intrudes. Many stocks are cupolas of hidden batholiths. Some circular or elliptical stocks may be volcanic plugs, which fill the vents of now extinct volcanoes.
What is stock in geology?
In geology, a stock is an exposed area igneous rock that originally formed as an igneous intrusion in other rocks. Stocks are differentiated from...
How are rocks classified?
There are three types of rocks on Earth, classified by how they formed. Igneous rocks are made from cooling magma. Sedimentary rocks are made from fractured rock particles and dissolved minerals cementing together over time. Metamorphic rocks are existing rocked changed by the prolonged application of heat and pressure.
Where is Ship Rock?
A classic example is Ship Rock, a volcanic neck on the Navajo Reservation that rises nearly 1,600 feet above the desert near Farmington, New Mexico. Although the use of "volcanic" in the name suggests that volcanic necks are extrusive features, they are comprised of intrusive igneous rocks.
What is the name of the rock that is formed by lava flow?
Geologists also use the term lava flow to describe the rock that eventually solidifies from the flowing, molten lava. Basalt is an example of an extrusive igneous rock formed from dark-colored lava. Rhyolite is an example of an extrusive igneous rock formed from light-colored lava.
What is a volcanic pipe?
Volcanic Pipe. A volcanic pipe is a vertical conduit beneath a volcano through which magma once passed on its journey from the magma chamber to the eruption site. Over time, volcanic pipes usually become clogged by solidified magma and other volcanic rocks, leaving a hard, cylindrical-shaped formation behind.
What are the features of a volcano?
As the name suggests, these features tend to be conical in shape and can be light- or dark-colored.
What is the name of the rock that is located in the main feeder pipe of a volcano?
Volcanic Neck. Named for its resemblance to the silhouette of a sailing ship, Ship Rock is a volcanic neck located where the main feeder pipe for a larger volcano was once located. The wall-like rock feature radiating outward from the volcanic neck is a dike (see below). Image copyright iStockphoto / Emre Corbaci.
What is the name of the crack in the Earth's surface from which lava pours out?
Fissure. A long crack on the Earth's surface from which lava pours out is called a fissure. This type of volcanic activity is called a 'fissure eruption'. It most commonly occurs in places where dark magmas with low silica contents erupt, such as the Holuhraun lava fields of Iceland and Kilauea Volcano of Hawaii.
How do sills form?
Sills can form from magmas with a range of silica contents. These features can vary from less than one inch up to hundreds of feet thick and can extend for many miles.
What are the processes that geologists study?
Geologists study Earth processes: Many processes such as landslides , earthquakes, floods , and volcanic eruptions can be hazardous to people. Geologists work to understand these processes well enough to avoid building important structures where they might be damaged.
What do geologists use to find metals in rocks?
Geologists conduct studies that locate rocks that contain important metals, plan the mines that produce them and the methods used to remove the metals from the rocks.
What degree do you need to become a geologist?
Although a bachelor's degree is required for entry-level employment, many geologists earn master's and/or doctorate degrees. The advanced degrees provide a higher level of training, often in a geology specialty area such as paleontology, mineralogy, hydrology, or volcanology.
What is required to prepare a geological map?
To prepare a map like this requires an understanding of volcanoes, an ability to recognize volcanic deposits in the field, an ability to prepare a map, and an ability to communicate. All geological tasks require a diversity of skills.
What can geologists do to help guide communities?
If geologists can prepare maps of areas that have flooded in the past, they can prepare maps of areas that might be flooded in the future. These maps can be used to guide the development of communities and determine where flood protection or flood insurance is needed.
How much do geologists make?
Starting salaries for geologists have recently ranged from $50,000 to $100,000 per year.
What is the study of the Earth?
Geology is the study of the Earth, the materials of which it is made, the structure of those materials, and the processes acting upon them. It includes the study of organisms that have inhabited our planet. An important part of geology is the study of how Earth's materials, structures, processes and organisms have changed over time.
What is the difference between a batholith and a stock?
is that batholith is (geology) a large irregular mass of intrusive igneous rock that has melted or forced itself into surrounding strata while stock is a store or supply.
When to lay in stock of wood?
Lay in a stock of wood for the winter season.
What happened to the stock of a company when the bad news came out?
When the bad news came out, the company's stock dropped precipitously.
What does "supply" mean?
To provide with material requisites; to store; to fill; to supply.
