Pressure from the collision twisted the Silurian Shawangunk Conglomerate, shattering the gray quartzite as it was uplifted.

The mountains consist of Silurian Shawangunk conglomerate.

The Shawangunk Conglomerate was deposited over the Martinsburg Shale in thick braided rivers during the Silurian ( about 420 million years ago ); both sequences of sedimentary rock were subsequently deformed and uplifted during the Permian ( about 270 million years ago ).

The evidence for this is the Silurian Shawangunk Conglomerate, a massive, ridge-forming quartz sandstone and conglomerate formation, which rests unconformably on a surface of older gently-to steeply-dipping pre-Silurian age strata throughout the region.

The Kittatinny Mountain is of the Silurian Shawangunk Conglomerate which is mainly composed of quartz.

The primary mountains within the county ( From west to east: Wills, Evitts, Dunning, and Tussey mountains ) extend from the southern border with Maryland to the northeast into Blair County, and are held up by the Silurian Tuscarora Formation, made of quartz sandstone and conglomerate.

The Silurian Shawnangunk conglomerate that was under a shallow sea, lifted due to pressure.

The Ordovician, named after the Celtic tribe of the Ordovices, was defined by Charles Lapworth in 1879 to resolve a dispute between followers of Adam Sedgwick and Roderick Murchison, who were placing the same rock beds in northern Wales into the Cambrian and Silurian periods respectively.

The Ordovician and Silurian periods were warm greenhouse periods, with the highest sea levels of the Paleozoic ( 200 m above today's ); the warm climate was interrupted only by a ~ 30 Ma cool period, the Early Palaeozoic Icehouse, culminating in the Hirnantian glaciation.

A significant evolutionary milestone during the Silurian was the appearance of jawed and bony fish.

The Silurian system was first identified by British geologist Sir Roderick Impey Murchison, who was examining fossil-bearing sedimentary rock strata in south Wales in the early 1830s.

It is not clear when the transition to a terrestrial existence was made, but it is considered plausible that it took place between the Ordovician and late Silurian — approximately — via the intertidal zone.

During the Silurian, was readily available, so little water needed expending to acquire it.

Eventually, through patient mapping and innovative use of index fossil analysis, Lapworth showed that what was thought to be a thick sequence of Silurian rocks was in fact a much thinner series of rocks repeated by faulting and folding.

In 1832 Dr Thomas Lloyd, the Ludlow doctor and amateur geologist, met Roderick Murchison at Ludford Corner to study the rocks exposed along the River Teme and on Whitcliffe, advancing Murchison's theory for a Silurian System that he was to publish in 1839.

Immediately above the topmost layer of the marine rock sequence forming Murchison's Silurian period was a thin layer of dark sand containing numerous remains of early fish, especially their scales, along with plant debris, spores and microscopic mites.

Rosendale natural cement was produced from dolostone extracted from the Rosendale and Whiteport members of the Late Silurian Rondout Formation.

As was standard practice, as revealed by inscriptions, the Romans matched their deities with local Silurian ones, and the local deity Ocelus was identified with Mars, the Roman god of war.

The geologic period Silurian was first described by Roderick Murchison in rocks located in the original lands of the Silures, hence the name.

By the late 1880s and early 1900s, the trend extended both north and south across east-central Ohio and included several counties in western New York where gas was discovered in Lower Silurian Medina Group sandstones.

During the Ordovician and Silurian periods ( 500-410 million years ago ), Hạ Long Bay was deep sea.

Terrance Dicks ' adaptation of Warriors of the Deep, for example, clarified that Silurian Ichtar was a survivor of the Doctor Who and the Silurians encounter.

65 % of his palaeontological evidence featured in the 1839 publication " The Silurian System " was from Dudley.

Sir Roderick Impey Murchison, 1st Baronet KCB DCL FRS FRSE FLS PRGS PBA MRIA ( 22 February 1792 – 22 October 1871 ) was a Scottish geologist who first described and investigated the Silurian system.

The result was the establishment of the Silurian system under which were grouped, for the first time, a remarkable series of formations, each replete with distinctive organic remains other than and very different from those of the other rocks of England.

The establishment of the Silurian system was followed by that of the Devonian system, an investigation in which Murchison assisted, both in the south-west of England and in the Rhineland.

The Bar Harbor Formation, which is made up predominantly of sands and silts, and Cranberry Island Formation, made up from volcanic ash and magmatic debris, occurred under similar circumstances in the Silurian and Devonian periods, and were deposited on top of the Ellsworth Schist.

The Niagara Escarpment has origins dating back into the Silurian age some 430 to 450 million years ago, a time when the area lay under a shallow warm sea.

Silurian Canberra Formation, calcareous Shale is under most of the suburb.

It has a Silurian tonalite intrusion under the whole course referred to as granite above.

The earliest land vegetation is found in early Silurian entisols and inceptisols, and with the growth of land vegetation under a protective ozone layer several new soil orders emerged.

She plays two Silurian sisters who have been disturbed under the earth and appeared in the following series.

Rocks under Mitchell are from the Silurian age.

The rock under Forde consists of Canberra Formation of middle Silurian age.

The rock under Moncrieff consists of Canberra Formation of middle Silurian age.

The oldest known scorpions lived around 430 million years ago in the Silurian period, on the bottom of shallow tropical seas.

Through Silurian time, the deposition of coarse alluvial sediments gave way to shallow marine fine-grained muds, and eventually to clear-water carbonate sediment accumulation with reefs formed from the accumulation of calcareous algae and the skeletal remains of coral, stromatoporoids, brachiopods, and other ancient marine fauna.

Border between the Ordovician and Silurian sediments, showing the very marked difference from the shallow water light gray Ordovician calcareous sandstone and brown Silurian deep water mudstone.

Galeaspida lived in shallow, fresh water and marine environments during the Silurian and Devonian times ( 430 to 370 million years ago ) of what is now Southern China, Tibet and Vietnam.

They then took a boat trip from Dunglass Burn east along the coast with the geologist Sir James Hall of Dunglass and at Siccar Point found what Hutton called " a beautiful picture of this junction washed bare by the sea ", where 345 million year old Devonian Old Red Sandstone overlies 425 million year old Silurian greywacke.

A major current ( 2004 – 08 ) project of UNESCO's International Geoscience Programme ( IGCP ), following a successful probe of the Ordovician biodiversification, has as its major objective to seek the possible physical and chemical causes, related to changes in climate, sea level, volcanism, plate movements and extraterrestrial influences, of the Ordovician biodiversification, this end-Ordovician extinction, and the ensuing Silurian radiation.

They evolved in the sea at the beginning of the Silurian Period, some 50 million years before the first sharks appeared.

Miller's death was very tragic, and his life brief, but he left a heritage of new discoveries of several Silurian sea scorpions ( the eurypterid genus Hughmilleria was named in his honor ), and many Devonian fishes, including several placoderms ( the arthrodire Millerosteus also honored him ), intriguingly described in his popular books.

In geological terms, the Southern Uplands consist mainly of Silurian deposits laid down from 400-500 million years ago and pushed up from the sea bed into an accretionary wedge by the collision of ancient continents.

The ancient rocks that characterise Charnwood Forest are an eroded anticline-the layers of sediment built up on a sea floor were uplifted some 420 million years ago, at the end of the Silurian period.

During the Ordovician and Silurian periods, the genus Dalmanites was widespread all over the world, inhabiting a variety of climates and sea conditions.