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This latter situation is what we find for most strata in the geologic record. We will examine seven lines of evidence that clearly show that many strata were not 

It seems as though we are driving through a huge “layer cake,” cut open to expose the inside. Grand Canyon looks this way. Most of the exposed layered rocks are sedimentary rocks. It appears one layer was deposited directly upon another. The “stack” of layers might have been tilted, folded, or faulted "Strata are the ribboned horizontal layers of minerals and sediment that underlie the topography of all the landmasses on the earth and have been revealed by erosion over hundreds of millions of years. Although the practice of mapping geologic layers had begun in the mid-17th century, the science of how strata formed was still nascent. Stratum, plural Strata, sedimentary rock layer bounded by two stratification planes, the latter being produced by visible changes in the grain size, texture, or other diagnostic features of the rocks above and below the plane.

Geologic strata

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Mesozoic An era in geologic history that contained three related periods which became renowned for their large reptiles: the Triassic (which spanned from 251 to 199.6 million years ago), the Jurassic (which spanned from 199.6 to 145.5 million years ago), and the Cretaceous (which spanned from 145.5 to 65.5 million years ago). sedimentary strata where the older underlying layers are tilted and the erosional surface is irregular. • Disconformity: Unconformity between parallel layers of sedimentary rock which is recognizable due to an irregular erosional surface. • Nonconformity: An irregular erosional surface between strata and younger igneous or metamorphic rock.

See more ideas about geology, strata, geology rocks. Geologic Time Scale with ages shown in millions of years ago (Ma).

Synonyms for Geological strata in Free Thesaurus. Antonyms for Geological strata. 24 synonyms for stratum: class, group, level, station, estate, rank, grade, 

Geologic Time and the Relationship to Strata Depth. The Earth is said to have formed some 4.6 billion years ago (give or take). To put this in context, that is 4,600 million, or 4,600,000,000. Fun Fact: Did you know that if you were to count to a billion, non-stop, no breaks, no sleep, it would take you 32 years!

Geologic strata

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by Michael Oard For many years, Ager pointed out that there was an enormous amount of time missing from the strata relative to the long geological time assigned to the strata by geological dating methods.

It appears one layer was deposited directly upon another. The “stack” of layers might have been tilted, folded, or faulted "Strata are the ribboned horizontal layers of minerals and sediment that underlie the topography of all the landmasses on the earth and have been revealed by erosion over hundreds of millions of years. Although the practice of mapping geologic layers had begun in the mid-17th century, the science of how strata formed was still nascent.
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Geologic strata

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They often occur over and over in many vertical sequences of strata. Frequently they occur with animal footprints preserved in a manner similar to the mud cracks.


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strata made by White Watson |Source=[http://www.flickr.com/photos/49015875@N00/5416245693/ Model of Derbyshire strata 2] |Date=2011-02-04 15:07 

1 Share. Like Comment Share. Strata Lab is at Strata Lab. February 25 · East London, South Africa ·. Strata Lab is simply the best when it comes to coring of Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateEONSBy looking at the layers beneath our Strata Lab. 232 likes · 1 talking about this · 2 were here. Engineering Materials & Geotechnical Testing Laboratory Strata Lab. 265 likes · 1 talking about this · 3 were here.