Different studies have come to different conclusions about the amount of oxygen in the atmosphere during different parts of the Mesozoic, with some concluding oxygen levels were lower than the current level ( about 21 %) throughout the Mesozoic, some concluding they were lower in the Triassic and part of the Jurassic but higher in the Cretaceous, and some concluding they were higher throughout most or all of the Triassic, Jurassic and Cretaceous.

Beneath the drift deposits of the Vale of York lie Triassic sandstone and mudstone, and lower Jurassic mudstone but these are completely masked by the surface deposits.

Probainognathus is a genus of meat-eating mammal-like reptile ( Therapsids ) that lived during the lower Upper Triassic of South America.

Geological Map of Great Britain KEY: white = Quaternary ( alluvium ); beige = Palaeogene rocks ; lime green = Cretaceous ; blue / green = Lower Cretaceous ; light blue = middle / upper Jurassic ; mid blue = lower Jurassic ; dark purple = upper Triassic ; light purple = lower Triassic ; light orange = upper Permian ; brick orange = lower Permian ; light blue = Westphalian ( stage ) | upper Carboniferous ( Coal Measures ); mid blue = Namurian | middle Carboniferous ; muddy blue = lower Carboniferous ( limestone ); dull orange & brown = Devonian ; light blue = Silurian ; slate blue = Ordovician ; dark slate blue = Cambrian ; mid orange = Neoproterozoic ( Dalradian ); dark green = Neoproterozoic ( Torridonian ); pink = Lewisian complex | Lewisian ; bright red = granite ; dull red = Palaeogene volcanics

The Lyakhovsky Islands consist of a folded and faulted assemblage of Precambrian metamorphic rocks ; upper Paleozoic to Triassic sandstones and shales ; Jurassic to lower Cretaceous turbidites ; Cretaceous granites ; and ophiolites.

The Anzhu Islands consist of a highly faulted and folded assemblage of Ordovician to Devonian limestones, dolomites, sandstones, shales, volcanoclastic strata, and igneous rocks ; upper Paleozoic to Triassic sandstones and shales ; Jurassic to lower Cretaceous turbidites ; and upper Cretaceous to Pliocene sandstones and shales.

In the geologic timescale, the Anisian is the lower stage or earliest age of the Middle Triassic series or epoch and lasted from 245 million years ago until 237 million years ago, approximately.

Nevertheless, the usage of Treptichnus pedum, a reference ichnofossil for the lower boundary of the Cambrian, for the stratigraphic detection of this boundary is always risky because of occurrence of very similar trace fossils belonging to the Treptichnids group well below the T. pedum in Namibia, Spain and Newfoundland, and possibly, in the western USA.

The Vendian concept was formed stratigraphically top-down, and the lower boundary of the Cambrian became the upper boundary of the Vendian.

The lower boundary of the Vendian was suggested to be defined at the base of the Varanger ( Laplandian ) tillites.

The lower boundary of the Vendian could have a biostratigraphic substantiation as well taking into consideration the worldwide occurrence of the Pertatataka assemblage of giant acanthomorph acritarchs.

The lower boundary GSSP of the Ediacaran is at the base of the cap carbonate ( Nuccaleena Formation ), immediately above the Elatina diamictite in the Enorama Creek section, Brachina Gorge, Flinders Ranges, South Australia.

The GSSP of the upper boundary of the Ediacaran is the lower boundary of the Cambrian on the SE coast of Newfoundland approved by the International Commission on Stratigraphy as a preferred alternative to the base of the Tommotian Stage in Siberia which was selected on the basis of the ichnofossils Treptichnus pedum.

As to the Treptichnus pedum, a reference ichnofossil for the lower boundary of the Cambrian, its usage for the stratigraphic detection of this boundary is always risky because of the occurrence of very similar trace fossils belonging to the Treptichnids group well below the T. pedum in Namibia, Spain and Newfoundland, and possibly, in the western United States.

Hernando de Alarcón, a Spanish navigator of the 16th century, noted for having led an early expedition to the Baja California peninsula, meant to be coordinated with Francisco Vasquéz de Coronado's overland expedition, and for penetrating the lower Colorado River, perhaps as far as the modern California-Arizona boundary.

His argument relies on the assumption that boundary conditions supply degrees of freedom that instead of being random are determined by higher level realities whose properties are dependent, but distinct, from the lower level from which they emerge.

Mesoscale meteorology is the study of atmospheric phenomena that has horizontal scales ranging from microscale limits to synoptic scale limits and a vertical scale that starts at the Earth's surface and includes the atmospheric boundary layer, troposphere, tropopause, and the lower section of the stratosphere.

In all cases, microwave includes the entire SHF band ( 3 to 30 GHz, or 10 to 1 cm ) at minimum, with RF engineering often putting the lower boundary at 1 GHz ( 30 cm ), and the upper around 100 GHz ( 3 mm ).

* Proterozoic: this eon refers to the time from the lower Cambrian boundary, 542 Ma, back through 2500 Ma.

** Neoproterozoic: The youngest geologic era of the Proterozoic Eon, from the Cambrian Period lower boundary ( 542 Ma ) back to 1000 Ma.

Other tributaries of the Warta within Poznań are the Junikowo Stream ( Strumień Junikowski ), which flows through southern Poznań from the west, meeting the Warta just outside the city boundary in Luboń ; the Bogdanka and Wierzbak, formerly two separate tributaries flowing from the north-west and along the north side of the city centre, now with their lower sections diverted underground ; the Główna, flowing through the neighbourhood of the same name in north-east Poznań ; and the Rose Stream ( Strumień Różany ) flowing east from Morasko in the north of the city.

In all cases, microwave includes the entire SHF band ( 3 to 30 GHz, or 10 to 1 cm ) at minimum, with RF engineering often putting the lower boundary at 1 GHz ( 30 cm ), and the upper around 100 GHz ( 3mm ).

In its lower course, it forms part of the boundary between the two states and empties into Sabine Lake, an estuary of the Gulf of Mexico.

It is very likely that further investigations will push back the Sri Lankan lower boundary to match that of South India.

If the refractive index is lower on the other side of the boundary and the incident angle is greater than the critical angle, no light can pass through and all of the light is reflected.

Signals in a higher refractive index layer, i. e., duct, tend to remain in that layer because of the reflection and refraction encountered at the boundary with a lower refractive index material.

A drop may form when liquid accumulates at the lower end of a tube or other surface boundary, producing a hanging drop called a pendant drop.

from downstream, where the water level is much lower, it is a high, elaborately facaded pavilion.

And ( D ) all action of a physical kind pertinent to the mission is relegated to the line of men on the lower rank.

There is indeed a moral responsibility on man himself, for his own soul's sake, to respect lower life and to avoid the infliction of suffering, but this viewpoint Schweitzer rejects.

Assuming the lower figure for the big blast and one shot estimated by the Japanese at 10 megatons, a conservative computation is that the 24 announced tests produced a total yield of at least 60 megatons.

Rhode Island's rate of $.07 per mile is considerably lower than reimburseable rates in the federal government and in industry nationally which approximate a $.09 per mile average.

Determine if the particular State's unadjusted allotment ( result obtained in item 11 above ) is greater than its maximum allotment, and if so lower its unadjusted allotment to its maximum allotment.

The lower number is always divided into the upper number: Af

A cross-section of a normal lower human leg is shown in Fig. 8 with the various parts labeled.

There is one exception to the above statement as has been pointed out, and that is that fluids can relax by flowing into fields of lower rates of shear, so the statement should be modified by stating that the mechanics are similar.

The Af layers are stacked normal to the ( 111 ) axis with the lower oxygens of one layer directly above the upper oxygens of the neighboring lower layer, in such a manner that the repeat is every three layers.

It is interesting to note that medium compulsives in the unstructured schools made the lowest achievement scores ( although not significantly lower ).

It will be seen that where the scope is similar, the Athabascan ratios come out somewhat higher ( as indeed they ought to with a total ratio of 2.8 as against 3.5 or 4: 5 ) except for verbs, where alone the Athabascan ratio is lower.

In so far as this goal is achieved, the society becomes more fluid, artificial barriers to social mobility are reduced, and people at the lower end of the social hierarchy share more fully in the material and cultural goods of society.

One is that whatever is ecumenical has to do with some over-all organization at `` the top '' and needs only to be understood at the so-called `` lower levels ''.

Treasury Secretary Douglas Dillon said the economy is expected to advance by a whopping 8% next year, paving the way for lower taxes.

People tend to be less cooperative if they perceive that the frequency of helpers in the population is lower.

The arithmetic mean may be misinterpreted as the median to imply that most values are higher or lower than is actually the case.

A unique feature is their ability to feed by suction using only one half of the lower jaw at a time.

They differ from the cryptobranchids by having the prearticular bones in their lower jaw fused and reproduction is by internal fertilisation.

The petition is made to a higher court for the purpose of overturning the lower court's decision.