Is the Deep Earth churning out diamonds?
Diamonds may not be quite as rare as you think, scientists report. “Diamond formation in the deep Earth—the very deep Earth—may be a more common process than we thought,” says Johns Hopkins Universit...
HERE IS TODAY
An interactive look at time...
Is the Deep Earth churning out diamonds?
Diamonds may not be quite as rare as you think, scientists report. “Diamond formation in the deep Earth—the very deep Earth—may be a more common process than we thought,” says Johns Hopkins Universit...
Snowshoe Lava Field
The Snowshoe Lava Field is a volcanic field associated with the Mount Edziza volcanic complex in northern British Columbia, Canada. It is on the southern end of the Big Raven Plateau and is an area of...
Mudcrack
Mudcracks (also known as desiccation cracks or mud cracks) are sedimentary structures formed as muddy sediment dries and contracts. Crack formation also occurs in clayey soils as a result of a re...
Bedrock
In stratigraphy, bedrock is consolidated rock underlying the surface of a terrestrial planet, usually the Earth. Above the bedrock is usually an area of broken and weathered unconsolidated rock in th...
Harrat al Birk
Harrat al Birk is an ancient lava field located along Saudi Arabia's Red Sea coastline.
Yakutat Block
The Yakutat Block is a terrane in the process of accreting to the North American continent along the south central coast of Alaska. It has been displaced about 600 km northward since the Cenozoic alon...
Basement (geology)
In geology, basement and crystalline basement are the rocks below a sedimentary platform or cover, or more generally any rock below sedimentary rocks or sedimentary basins that are metamorphic or igne...
Sequence (geology)
A sequence in geology refers to a sequence of geological events, processes, or rocks, arranged in chronological order.A rock stratigraphical sequence is a geographical, or lithostratigraphic, discrete...
Volcanism
Volcanism is the phenomenon of eruption of molten rock (magma) onto the surface of the Earth or a solid-surface planet or moon, where lava, pyroclastics and volcanic gases erupt through a break in the...
Formation (stratigraphy)
A formation or geological formation is the fundamental unit of lithostratigraphy. A formation consists of a certain number of rock strata that have a comparable lithology, facies or other similar prop...
Sandfall
Sandfall (sand fall or grainfall) is a term applied to a variety of forms of sedimentary transport or sedimentary features belonging to the larger category of mass wasting, and are driven by wind, wat...
S-wave
A type of elastic wave, the S-wave, secondary wave, or shear wave (sometimes called an elastic S-wave) is one of the two main types of elastic body waves, so named because they move through the body o...
Crowder's Mountain
Crowders Mountain is one of two main peaks within Crowders Mountain State Park, the other peak being The Pinnacle. The park is located in the western Piedmont of North Carolina between the cities of ...
Marker horizon
Marker horizons or chronohorizons or marker beds are stratigraphic units of the same age and of such distinctive composition and appearance, that, despite their presence in separate geographic locatio...
Eclogitization
Eclogitization is the tectonic process in which the appearance of high-pressure, metamorphic facies, eclogite leads to an increase in crustal densities. These crustal density changes lead to a change...
Lake breakout
Lake breakout is a geological term that refers to the collapse of a (usually high-altitude) lake. High-altitude lakes tend to form in volcanic craters – where they are called crater lakes –...
Magma
Magma (from Greek μάγμα, "thick unguent") is a mixture of molten or semi-molten rock, volatiles and solids that is found beneath the surface of the Earth, and is expected to exist on other terrestrial...
HERE IS TODAY
An interactive look at time...
Thrust fault
A thrust fault is a type of fault, or break in the Earth's crust across which there has been relative movement, in which rocks of lower stratigraphic position are pushed up and over higher strata. The...
List of fossil sites
This list of fossil sites is a worldwide list of localities known well for the presence of fossils. Some entries in this list are notable for a single, unique find, while others are notable for the la...
Grus (geology)
Grus is an accumulation of angular, coarse-grained fragments (particles of sand and gravel) resulting from the granular disintegration (by the processes of chemical weathering and mechanical weatherin...