Outdoors Information


How Are Minerals Formed?


HOW ARE MINERALS FORMED?

MINERALS are naturally occuring, inorganic solids, with a characteristic chemical composition, having a regular atomic structure throughout. Man-made industrial diamonds are not considered true minerals. Having said that, there are also some Organic Minerals, such as Amber. Purists are reluctant to call organic minerals minerals, but they satisfy at least three of the criteria for inorganic mineral makeup, and therefore the point is open to debate.

How Many Minerals are there? There are about 4000 listed minerals on this planet but only a relatively few have gained popularity due to their pleasing apperance, often bizarre shapes, exquisite spectrum of colours, and trading value. Minerals are generally composed of more than one element or compound. Those which are made up of only one element are called Native Elements e.g. gold, silver, mercury, copper. The Conquistadores fell in love with New World gold and "liberated" it by the ship-load to fill the coffers of Government and Church in Spain. Silver too, along with Topaz, Tourmaline, Agate, Ruby, Diamond and many other precious rocks and minerals, have been highly prized for as long as Man was first enchanted by their beauty, commercial value and status it imparted to the wearer.

So, just how are minerals formed? Minerals can be formed in a wide variety of geological environments; deep inside volcanos, at the bottoms of deep oceans, deserts, salt lakes and cooling deep deposits of molten rock. Also, under the influence of heat and or pressure, when solutions and gasses holding concentrations of specific elements cool or evaporate, minerals growths are deposited inside rock fissures or voids. These minerals are sometimes forced through as a suspension in water, the water then evaporating leaving the mineral deposits as crystals (e.g. Amethyst) when the rock void is not fully filled or as Agates, when the rock is completely filled. These minerals are only visible when the rock is split open; it takes some skill to decide which rock to crack open! More about that later. An example of such crystal and mineral specimens for collectors are Geodes which are round rocks containing precipitated mineral salts, these being comomonly Agates (caused by mineral salt crystals forming inside Basalt rocks), Amethysts, Quartz, Jasper.

Minerals don't necessarily need heat or pressure to be formed; water saturated with mineral salts can leave deposits (Stalactites) as it drips down from the roof of a cave, forming corresponding Stalagmites directly below, over the centuries, where the drips hit. Eventually both grow to meet each other and thicken over the years. Sometimes, as a novelty, tourists can hang an item on a line at a cave, over which calcium carbonate saturated water runs; over a period of a few months it becomes encased in a hardening deposit of Calcium Carbonate.

THE THREE TYPES OF ROCK. Ok, the basic scene has been set, now let's examine in more detail the different mechanisms involved in mineral formation. All minerals are formed from ROCKS, which are an aggregate or mixture of various minerals and are the basic materials from which a mineral is formed. Rocks can be either:
Igneous - formed due to volcanic activity from the Earth's core.
Metamorphic - formed because of pressure or heat (e.g. tectonic plates colliding) on existing rocks, changing them into another type of rock.
Sedimentary - resulting from the layered compaction of weathered rock materials and/or shells.

Let us examine these rocks a little further:-

IGNEOUS ROCKS(from the Latin ignis - fire) can be further categorised as being


MORE RESOURCES:
This RSS feed URL is deprecated, please update. New URLs can be found in the footers at https://news.google.com/news


LancasterOnline

Outdoors calendar for Lancaster County, week beginning Jan. 20
LancasterOnline
Great American Outdoor Show coming: The event, the largest consumer sports and outdoor show in the world, is sponsored by the National Rifle Association, and will be held Feb. 3-11 at the Pennsylvania Farm Show Complex, 2300 N. Cameron St., Harrisburg ...



Quad City Times

'He could do anything': Outdoors community mourns loss of mentor, adventurer Dave Hill
Quad City Times
Dave Hill glides through the calm waters of Lake Potter at Sunset Marina in Rock Island during an outing in November 2016 with the Quad-City based Saukenuk Paddlers Canoe and Kayak Club. John Schultz, QUAD-CITY TIMES FILE PHOTO. Dave Hill. Buy Now ...



Opelika Observer

Gander Outdoors Announces New Website Launch | Business Wire
Business Wire (press release)
ST. PAUL, Minn.--(BUSINESS WIRE)--Gander Outdoors, formerly known as Gander Mountain, is celebrating the launch of its new online store GanderOutdoors.com. This newly redesigned website offers quick and easy access to essential gear and information for ...
Gander Outdoors to open in former Gander Mountain building near ...Opelika Observer

all 2 news articles »


Buffalo News

Knowledge is everything with fishing and the outdoors
Buffalo News
It's important to be a student of the outdoors, always willing to learn with every cast, every step. And as you collect that knowledge and store it away for that right set of circumstances, it can lead you to rewarding experiences that can also push to ...



Outdoors show, winter trek set for this weekend
GoErie.com
The Outdoor and Recreational Sports Show in Olean, New York, Saturday from 10 a.m. to 5 p.m. and Sunday, 10 a.m. to 3 p.m., at the Good Times of Olean Events Center, 800 E. State St. The event features outdoor and recreational sports vendors, programs ...



Outdoors: Trout fishing is beautiful at Folsom Lake
Stockton Record
Folsom Lake, located on the American River about 70 miles from Stockton, is kicking out some beautiful holdover rainbow trout this winter. Jerry Lampkin of TNG Motor Sports Guide Service and two other anglers landed 10 rainbows averaging 18 inches each ...



The Denver Post

Study finds Great Outdoors Colorado gives state $507 million economic boost
The Denver Post
Niko Verras and others collect trash last month on a vacant lot in Montbello that will be converted into an urban open space. By Bruce Finley | bfinley@denverpost.com | The Denver Post. January 16, 2018 at 12:01 pm. Grants from Colorado Lottery-funded ...



Chicago Sun-Times

The outdoors component of Museum Campus: The Field, the Shedd and Lake Michigan
Chicago Sun-Times
While looking at Sambar deer, our daughter said, ''They look like a cross of moose and capybara.'' I know moose up close, but I had no clue about capybara, the largest living rodent. Why she thought of that, I have no idea. There are always discoveries ...



Milwaukee Journal Sentinel

Woodside Elementary teacher shows students what the outdoors can teach them
Milwaukee Journal Sentinel
A Woodside Elementary School teacher is using his love of the outdoors to teach students with a unique education style. Peter Dargatz is in his third year teaching nature kindergarten to students. They spend time every day outdoors learning about ...



Where to put on the blades and skate outdoors
Wicked Local Medford
Before a snowstorm dumped up to 19 inches in the area on Jan. 4, the severe cold that had gripped the region left some of the best ice conditions around. Many communities offer some kind of outdoor skating; rinks are maintained on a regular basis, but ...

and more »

Google News

home | site map
© 2007