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geologyin.com
Rift Valleys: Formation, Pictures, and Examples
5+ day, 10+ hour ago —...Rift valley is a long, narrow depression in the Earth's crust.... ...The Rift Valley is not a single valley, but rather a system of interconnected... ...This rift valley in Iceland stretches along the Mid-Atlantic Ridge... ...The Mid-Atlantic Ridge is not technically a continental rift valley...
geologyin.com
Facts About Earth Magnetic Field
1+ week, 10+ hour ago —...The poles aren't fixed: The magnetic north pole and south pole are... ...Earth's magnetic field is weakening in an area known as the South Atlantic... ...Throughout history, the magnetic north and south poles have flipped...
geologyin.com
Quartz: Crystals Colors and Types (Pictures)
1+ week, 3+ day ago —...Quartz (SiO₂) silicon dioxide crystallizes in the trigonal crystal... ...Quartz is one of the most abundant minerals on Earth and comes in... ...Rose Quartz from Alto da Pitorra, Laranjeiras, Galileia, Minas Gerais... ..., Madagascar, India, Sri Lanka, and the United States....
geologyin.com
Fairburn Agate: South Dakota, Banded Thrill
1+ week, 6+ day ago —...In fact, Fairburn agate, named after its discovery location in South... ...Fairburn Agate is a type of agate distinguished by its exceptionally... ...the Buffalo Gap Grasslands, is a prime location for Fairburn agate... ...the grasslands of southwestern South Dakota, near the town of Fairburn...
geologyin.com
Quartizite: Properties, Colors, Uses
2+ week, 8+ hour ago —...Bianco Antico quartzite is a popular example, featuring a pale ivory...
geologyin.com
Velvet Obsidian: Volcanic, Shimmering Delight
3+ week, 10+ hour ago —...Velvet obsidian is found primarily in one location: Guadalajara, Mexico... ...This city in Jalisco, Mexico is known to be the source of most velvet...
geologyin.com
Recumbent Fold
3+ week, 1+ day ago —...Recumbent fold is a geologic feature in which rock layers are folded... ...This type of fold occurs when immense pressure from tectonic plates... ...The limbs are the two sides of the fold.... ...In a recumbent fold, the axial plane is nearly horizontal....
geologyin.com
The Most Expensive Jade Ever Sold
4+ week, 10+ hour ago —...The Barbara Hutton-Mdivani Necklace, also known as the Hutton-Mdivani... ...The most expensive jade is the Barbara Hutton-Mdivani Necklace Imperial... ...Other sources include Guatemala, Mexico, and New Zealand, but the... ...auction, purchased by the Cartier Collection....