Retrogradational Each stacking pattern will give different information on the behaviour of accommodation space, a major control of which is relative level. So a rapidly progradational pattern will be indicative of falling sea level, rapidly retrogradational is evidence for rapidly transgressing sea level and aggradational will be indicative of gently rising sea level. Sea level through geologic time[ edit ] Comparison of two sea level reconstructions during the last Myr.
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A aa -- a Hawaiian term for a lava flow that has a rough, jagged surface. Ores of the abundant metals only need to be 3 - 5 times as metal-rich as average rock. Andromeda -- the closest galaxy to the Milky way. It is approximately 2 million light-years away.
It lies 70 to km below the surface and may extend to a depth of km. B back-arc basin -- the region between an island arc and the continental mainland, commonly with at least some oceanic crust on its floor.
A mass of sand, gravel, or alluvium deposited on the bed of a stream, sea, or lake, or at the mouth of a stream 2. A unit of pressure, approximately equal to atmospheric pressure at sea level.
Basalt is the most abundant volcanic rock in the Earth's crust. A low, bowl-shaped area of land surrounded by higher lands. Bering Land Bridge-- the vast tundra plain that was exposed between Asia and North America during the Last Glacial Maximum, about 21, years ago; it served as a migration route for people, animals, and plants.
Also known as Beringia biogenic sediment -- sediments produced directly by the life processes of plants or animals. Upon mixing with seawater and cooling, the fluids precipitate a cloud of fine-grained sulfide minerals that resembles a cloud of black smoke.
C caldera -- a large, basin-shaped volcanic depression, more or less circular in form. Typically steep-sided, found at the summit of a shield volcano. The minerals harden to form a copy of the original structure or organism. Most commonly occur by the dissolution of soluble rocks, generally limestone.
Common cementing agents are calcite, quartz, and dolomite. Cenozoic -- the current geologic era, which began Place of origin of a mountain glacier. Used to determine direction of travel. The Big Dipper is a constellation. Averages about 35 km in thickness, but may be over 70 km thick under largest mountain ranges.
Continntal Drift Theory -- The theory that states that the present-day continents are the fragmented pieces of preexisting larger landmasses called supercontinents.Back to Earth Science. EARTH SCIENCE VOCABULARY. The following list of words and definitions is quite possibly the most comprehensive set of Earth science vocabulary known to a Jr.
High. At plate margins, adjacent plates not only collide, but they can move away from each other (diverge) or slide horizontally past each other instead. Depending on how the plates move relative to each other where they touch, plate margins are classified as one of three types - divergent, convergent and transform.
Groundwork Colorado Geology Overview The What, Where, When, How and Why of Colorado's Physical Past and Present.
Right: Trees and snow mark major Laramide uplifts in green and white while salmon pink marks the Colorado Plateau in this true-color satellite image of Colorado and surrounding states, courtesy NASA's Visible Earth.
(used relatively in restrictive clauses having that as the antecedent): Damaged goods constituted part of that which was sold at the auction. (used after a preposition to represent a specified antecedent): the horse on which I rode.
(used relatively to represent a specified or implied antecedent) the one that; a particular one that: You may choose which you like. Convergent, divergent and transform boundaries represent areas where the Earth’s tectonic plates are interacting with each other.
Convergent boundaries, of which there are three types, occur where plates are colliding. The word igneous is derived from the Latin word ignus, meaning “fire or fiery.”In geology, the word igneous applies to materials that have solidified from molten rock material, it also applies to the processes associated with the movement of molten material underground or erupting or the surface.