Tags Geology

Tag: Geology

The North American Cordillera: Constructive collisions

The mountain ranges of the North American Cordillera are made up of dozens of distinct crustal blocks. A new study clarifies their mode of...

Discovery of 1,800-Year-Old ‘Rosetta Stone’ for Tropical Ice Cores

Two annually dated ice cores drawn from the tropical Peruvian Andes reveal Earth's tropical climate history in unprecedented detail -- year by year, for...

Classification of Drainage Patterns

Introduction In geomorphology, a drainage system is the pattern formed by the streams, rivers, and lakes in a particular drainage basin. They are governed by...

A Tiny Grain Helps Reveal the History of a Rock

Mar. 25, 2013 — Researchers can use the mineral rutile to learn about rock types and their history. Two articles published in the journal...

Oxygen-Poor ‘Boring’ Ocean Challenged Evolution of Early Life

A research team led by biogeochemists at the University of California, Riverside has filled in a billion-year gap in our understanding of conditions in...

When the Ice Melts, the Earth Spews Fire

It has long been known that volcanic activity can cause short-term variations in climate. Now, researchers at the GEOMAR Helmholtz Centre for Ocean Research...

What is the Wilson cycle?

A Simple Wilson Cycle The Opening and Closing of An Ocean Basin Wilson cycle The cyclical opening and closing of ocean basins caused by movement of the...

Oceanic Crust Breakthrough: Solving a Magma Mystery

Oceanic crust covers two-thirds of Earth's solid surface, but scientists still don't entirely understand the process by which it is made. Analysis of more...

Mining Ancient Ores for Clues to Early Life

An analysis of sulfide ore deposits from one of the world's richest base-metal mines confirms that oxygen levels were extremely low on Earth 2.7...

Meteorite Triggered Scientific ‘Gold Rush’

A meteorite that exploded as a fireball over California's Sierra foothills this past spring was among the fastest, rarest meteorites known to have hit...

Debris Flow

Debris flows are fast moving, liquefied landslides of mixed and unconsolidated water and debris that look like flowing concrete. They are defined by their...

Australian Multicellular Fossils Point to Life On Land, Not at Sea,...

Ancient multicellular fossils long thought to be ancestors of early marine life are remnants of land-dwelling lichen or other microbial colonies, says University of Oregon...

Ol doinyo lengai Volcano,Tanzania

Ol Doinyo Lengai is an active volcano located in the north of Tanzania and is part of the volcanic system of the East African...

Greenland Rocks Provide Evidence of Earth Formation Process

Rocks dating back 3.4 billion years from south-west Greenland's Isua mountain range have yielded valuable information about the structure of Earth during its earliest...

The Wave, Arizona

Geology “The Wave” consists of intersecting U-shaped troughs that have been eroded into Navajo Sandstone of Jurassic age. The two major troughs, which comprise this...

Wadi Al-Hitan “Whales Valley”

Wadi Al-Hitan "Whales Valley" is a paleontological site in the Al Fayyum Governorate of Egypt, some 150 km southwest of Cairo. It was designated...

Farafra, Egypt

The Farafra depression  is the second biggest depression by size located in Western Egypt and the smallest by population, near latitude 27.06° North and...

Ammonites Found Mini Oases at Ancient Methane Seeps

Research led by scientists at the American Museum of Natural History shows that ammonites-an extinct type of shelled mollusk that's closely related to modern-day...

San Andreas Fault

The San Andreas Fault is a continental transform fault that runs a length of roughly 810 miles (1,300 km) through California in the United...

Evidence for a Geologic Trigger of the Cambrian Explosion

The oceans teemed with life 600 million years ago, but the simple, soft-bodied creatures would have been hardly recognizable as the ancestors of nearly...

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