The rocks, for convenience classed as pre-Cambrian, occur as several unconformable groups, chiefly developed in the south where alone their stratigraphy has been determined.
The rocks of Secondary and Tertiary ages have been profoundly affected by the Alpine movements, and are thrown into a series of complex folds, so that in numerous instances their stratigraphyis imperfectly understood.
The interpretation of the stratigraphy in this region is a difficult matter, partly on account of the absence of good exposures with fossils, and partly through the disturbed condition of the rocks.
Illustration: Distribution of Devonian Rocks] Stratigraphy of the Devonian Facies.
Another conspicuous feature in the progress ofstratigraphy during the second half of the 19th century was displayed by the rise and rapid development of what is known as Glacial geology.
In making use of fossil evidence for the purpose of subdividing the stratified rocks of the earth's crust, it is found to be applicable to the smaller details of stratigraphy as well as to the definition of large groups of strata.
The leading principles of stratigraphy may be summed up as follows: 1.
Closely related to stratigraphy (as well as to physiography, see pp.
In this same area the dredgings of Stetson (1936) on Georges Bank and the Esso Hatteras Light test provide us with information on the stratigraphy of the sediments which form the continental shelf and slope.
The sediments and stratigraphy of the east coast continental margin; Georges Bank to Norfolk Canyon: Woods Hole Oceanogr.
To geologists acquainted with the stratigraphy and the accompanying animal fossils, Dr.
Precambrian Stratigraphy So far we have talked only about rocks that are of the Cambrian Epoch or younger—rocks that may contain fossils.
Notes on the Stratigraphyof the Moab Region, Utah; Bull.
Oriel and Tracey (1970) who have published results of the latest study on the stratigraphy and age of the rock units in Fossil Basin.
Although short, Hayden's descriptions were the basis for later refinement of the stratigraphy of the Green River and Fossil basins.
Stratigraphy and paleontology of a late Pleistocene Basin, Harper Co.
Stratigraphy and vertebrate paleontology of Pleistocene deposits of southwestern Kansas.
Paleontology and nonmarine stratigraphyof the Cuyama Valley Badlands, California.
Archeological Stratigraphy Each excavated area was given an identifying letter (fig.
Stratigraphy also followed much the same sequence: Four inches of brick rubble on the top (T.
Nevertheless, the above results do follow fairly closely the dating of the groups arrived at on the evidence of stratigraphy and on the study of associated artifacts of all types.
Through our efforts here we were able to confirm the suspected stratigraphy in the Tank Site and, at least partly, define Phase II of the Topanga Culture.
Digging in the deeper northwestern part of the site was furthered with the intent of verifying the suggested stratigraphy and acquiring, possibly, a deep undisturbed burial in better condition than those from the upper soil horizons.
Since these two sites occupy almost contiguous positions and with the distribution of cultural elements being such as it is, the suggested cultural stratigraphy observed in 1947 seems to be fairly well confirmed.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "stratigraphy" in a variety of sentences. We hope that you will now be able to make sentences using this word.
