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Palaeos Mesozoic: Triassic: Early Triassic The Early Triassic Period of the Mesozoic Era The later Early Triassic (Olenekian age) Archosauriform Garjainia, a member of the family Eyrthosuchidae. And in the arid climes of the early Mesozoic, the reptiles had an obvious metabolic advantage, despite the superior locomation and care of young behavior of the mammals. www.palaeos.com /Mesozoic/Triassic/EarlyTrias.htm   (652 words)

Triassic The Triassic was named in 1834 by Freidrich Von Alberti[?] for the three distinct layers of redbeds, capped by chalk, followed by fl shales that are found throughout Germany and Northwest Europe. The Triassic is the first Era of the Mesozoic Era -- the Age of Dinosaurs. The first Angiosperms (flowering plants) may have evolved during the Triassic as did the first flying vertebrates although the latter appear to be flying reptiles, not ancestors of birds. www.ebroadcast.com.au /lookup/encyclopedia/tr/Triassic.html   (303 words)

[No title] Early Triassic palaeogeography is relatively simple, largely because continents were joined together in a single block known as Pangea. The evolution of the latitudinal temperature gradient during the rest of the Early Triassic (Dienerian, Smithian, and Spathian) is still poorly understood (Kidder and Worsley 2004). Because the shape, intensity, and evolution of the SST gradient through the Early Triassic are actually unknown, we constructed a number of hypothetical SST gradients using the present-day Pacific gradient as a starting point (data from the National Oceanic and Atmospheric Administration). www.nhm.ac.uk /hosted_sites/pe/2004_2/triassic/exam1.htm   (2190 words)

Palaeos Mesozoic : Triassic : The Triassic Period The Triassic Period is the first geological period of the Mesozoic era or "Age of Reptiles". The Triassic saw the single vast supercontinent of Pangea straddling the equator. Bivalves, ammonoids and brachiopods all recovered from the Permian extinction to dominate the Triassic. www.palaeos.com /Mesozoic/Triassic/Triassic.htm   (1167 words)

The Triassic Period of the Mesozoic Era The Triassic also follows the largest extinction event in the history of life, and so is a time when the survivors of that event spread and recolonized. The organisms of the Triassic can be considered to belong to one of three groups: holdovers from the Permo-Triassic extinction, new groups which flourished briefly, and new groups which went on to dominate the Mesozoic world. In the Lower Triassic the sea extended east to Idaho, Colorado, and Wyoming; during the Middle Triassic the sea submerged British Columbia; and during the Upper Triassic the sea extended into Alaska. www.science501.com /PTTriassic.html   (876 words)

alb21-3 Triassic biochronology is dominated by the ammonoid paleontologist and marine micropaleontologist. The Paleorhinus biochron and the correlation of the nonmarine Upper Triassic of Pangaea. Taxonomic and biochronological significance of specimens of the Triassic dicynodont Dinodontosaurus Romer, 1943 in the Tübingen www.biologie.uni-hamburg.de /b-online/kerp/Albart14.htm   (3493 words)

Lecture 9 - Triassic: Moenkopi, Karroo, Ischigualasto The Middle Triassic basically continues the pattern seen in the early part of the period, except that the terrestrial record is not nearly as good. Since the Triassic, that part of northern Africa drifted north with the rest of the plate and formed the Alps, in which the rocks now outcrop in the Lake Lugano region of Italy and Switzerland. Early on in the Triassic one or two branches of diapsids lost the lower bar of bone below the lower temporal opening. rainbow.ldeo.columbia.edu /courses/v1001/9.html   (2271 words)

Triassic Dinosaurs - ZoomDinosaurs.com During the early Triassic, corals appeared and ammonites recovered from the Permian extinction. Glossopteris was the dominant southern hemisphere tree during the Early Triassic period. and early species of gymnosperms (seed plants, such as the evergreens, in which the seeds are not enclosed) dominate the Triassic terrain. www.enchantedlearning.com /subjects/dinosaurs/mesozoic/triassic   (686 words)

Triassic Gerrothorax Dinosaur Mastodonsaurus Protosuchus archosaurs Podokosaurus Coelophysis Placerias Plateosaurus ... There were two large extinctions in the Late Triassic one at the beginning and another at the end. From the Late Triassic into Early Jurassic, dinosaur radiation produces faunas with coelophysoids as top predators and prosauropods and various ornithischian groups (primitive thyreophorans, heterodontosaurids, etc.) as main herbivores. A good Late Triassic example is Chinle Formation of the American Southwest that is famous for the Petrified Forest. www.dinosaurcollector.150m.com /LTriassicA.html   (1181 words)

Untitled Revueltosaurus was one of several animals from the Late Triassic that were known are only from their teeth, and was thought to be an ancestor of the plant-eating ornithischian dinosaurs like Stegosaurus and Triceratops, which roamed the world millions of years later in the Jurassic and Cretaceous periods. Oddly, skeletal remains of the Triassic's abundant amphibians are common in Moenkopi sediments, but their trackways are not, a puzzle that might be explained by differences in habitats not clearly observed in the Moenkopi's geology. The late Triassic of Arizona was remarkably alive and today amid the beauty of the sculpted Chinle badlands 225 million years later, a fossil hunter need not walk far to discover petrified remains weathering from the red clay and imagine a time when dinosaurs first walked the earth. www.t-rat.com /32   (3449 words)

The Permo-Triassic Extinction At the boundary between the Permian and Triassic systems, the diversity of life represented in the fossil record is reduced to a level not seen since the Cambrian. Life on the early Triassic earth was remarkably homogenous, as a handful of taxa which survived the extinction proliferated across the planet, for instance the brachiopod Lingula, the bivalves Claraia, Eomorphis, and Unionites, the weedy plant Isoetes, and the mammal-like reptile Lystrosaurus. Long-period Milankovitch cycles from the Late Triassic and Early Jurassic of eastern North America and their implications for the calibration of the early Mesozoic time scale and the long-term behavior of the planets. www.geocities.com /earthhistory/permo.htm   (6257 words)

Origin of Dinosaurs and Mammals - Erickson Prior to the Triassic, in the Late Permian, advanced mammal-like reptiles, known as therapsids, overwhelmingly dominated the terrestrial vertebrate fauna. Among the earliest synapsids were the pelycosaurs, the so-called 'primitive mammal-like reptiles.' Dominant in the Late Pennsylvanian and Early Permian, the pelycosaurs were succeeded in the Late Permian by their descendants, the therapsids, which flourished into the Triassic. By the end of the Triassic, the therapsids were on the brink of extinction; their descendants, the mammals, barely survived into the Jurassic and beyond. microlnx.com /dinosaurs/Synapsid_Diapsid.html   (2440 words)

Triassic - Wikipedia, the free encyclopedia The supercontinent Pangaea was rifting during the Triassic, especially late in the period, but had not yet separated. The Triassic climate was generally hot and dry, forming typical red bed sandstones and evaporites. Three categories of organisms can be distinguished in the Triassic record: holdovers from the Permian-Triassic extinction, new groups which flourished briefly, and other new groups which went on to dominate the Mesozoic world. en.wikipedia.org /wiki/Triassic   (1717 words)

[No title] By early Triassic times, cynodonts had diverged into large predaceous carnivores such as Cynognathus and moderate large omnivorous and herbivorous types such as Trirachodon and Diademodon. From this family evolved he highly specialized and extremely mammal-like Tritylodontidae of the late Triassic to Middle Jurassic, the "rodents" of the early Mesozoic and culmination of the herbivorous cynodont radiation. Cynodont and early mammalian brains were larger than sauropsid (reptilian) brains not because they were more intelligent, but because of the enlarged olfactory and auditory bulbs. bioweb.wku.edu /courses/Biol459/f2000/protected/mammevol.htm   (3112 words)

Ecology of the Triassic There is evidence that during the Triassic the cynodonts evolved endothermy, from nerves and blood vessels serving whiskers on the animal snouts. Through the Triassic period the mammal like reptiles, continued to diversify, though by the Mid to Late Triassic the Rhynchosaurs group had risen to equal dominance, the Thecodonts had also risen in importance (see figure 2). One of the strangest animals of the Triassic seas was the Tanystropheus an early ruling reptile known from fossil localities in Germany, Switzerland and Israel. palaeo.gly.bris.ac.uk /Palaeofiles/Triassic/ecoloftri.htm   (1747 words)

Triassic Plants - ZoomDinosaurs.com The Triassic was the beginning of a boom in conifers and cycadophytes. Seed ferns like Glossopteris and early species of gymnosperms (seed plants, such as the evergreens, in which the seeds are not enclosed) dominated the early Triassic terrain. Glossopteris was a dominant plant in Gondwana (the southern supercontinent) early in the Triassic period. www.enchantedlearning.com /subjects/dinosaurs/plants/Triassic.shtml   (589 words)

MESOZOIC the DINOSAURS Diorama Cretaceous, Jurassic, Triassic, Early, Middle, Late The Early Triassic is dominated by the plants and animals that had survived the Late Permian extinction. The Middle Triassic is a period of transition as dicynodonts and cynodonts whose ancestors dominated the Late Permian decline and archosaurs the ancestors of dinosaurs and crocodiles experiment with a variety of plant eating and carnivorous forms. The Triassic Seas were a time of great change as the great families of aquatic reptiles evolved. www.dinosaurcollector.150m.com /mesozoic_home.htm   (1130 words)

The Anchisaur-Plateosaur Empire Early dinosaurs had co-existed with them, but had been unable to attain dominance until their overlords had vanished. Surprisingly, the top predators of these early prosauropod zones are holdovers from the mid-Trassic - ornithosuchid and rausiuchid thecodonts (H and L in Fig. Thus, during the later Triassic and onwards, the terrestrial ecosystem is dominated by sauropodomorphs of all types and sizes, from slightly-built thecodontosaurs to giant (length to 9 meters, weight to 2 tonnes) plateosaurids, melanorosaurids (see above diagram) and proto-sauropods. www.kheper.net /evolution/biota/Plateosaur.html   (872 words)

Early Triassic Ammonoid Fossils In Nevada At the most fossiliferous and famous of the Early Triassic geologic sections, the extinct cephalopods occur in three of the seven limestone beds in the lowermost portions of Lower Triassic Thaynes Formation. The ammonoids occur, of course, in the Lower Triassic Thaynes Formation, which is sporadically exposed throughout a specific geographic area of Nevada. In California, noteworthy fossiliferous outcrops of ammonoid-bearing Early Triassic strata also occur at Union Wash (Inyo County, in the shadows of Mount Whitney; the ammonoids there can be found in the Union Wash Formation). members.aol.com /Waucoba5/thaynes/nevadaammonoids.html   (1134 words)

STORMS IN THE LATE PERMIAN AND EARLY TRIASSIC   (Site not responding. Last check: 2007-11-04) Late Permian and Early Triassic hurricanes could have persisted longer and travelled to higher paleolatitudes which were also warm at the time. The highest frequency of Triassic storm deposits was in the Middle, with the Early and Late being roughly equal. Pebbly storm beds should be particularly conspicuous in the Early Triassic as flat pebbles should have been relatively easy to generate when diminished levels of bioturbation facilitated early cementation of shallow sediment layers that could be ripped up by storms. gsa.confex.com /gsa/2001AM/finalprogram/abstract_24207.htm   (426 words)

Early Triassic - Wikipedia, the free encyclopedia The Early Triassic (also known as Lower Triassic, Buntsandstein, or Scythian) is the first of three epochs of the Triassic period. The Permian-Triassic extinction event spawned the Triassic period. The most common Early Triassic hard-shelled marine invertebrates were bivalves, gastropods, ammonoids, echinoids, and a few articulate brachiopods. en.wikipedia.org /wiki/Early_Triassic   (146 words)

Late Triassic Dinosaurs - ZoomDinosaurs.com Pachysauriscus - a medium-sized plateosaurid prosauropod (an early, long-necked quadrupedal plant-eater) from Germany, 225-208 mya. - a double-crested theropod from the late Triassic and early Jurassic, 208-194 mya. - a prosauropod from the late Triassic and early Jurassic, a heavily-built plant-eater 36 feet (11 m) long from Argentina, 225-219 mya. www.zoomdinosaurs.com /subjects/dinosaurs/mesozoic/triassic/lt.shtml   (1184 words)

Mesozoic Dinosaurs - Enchanted Learning Software The earliest period of the Mesozoic Era was the Triassic period (248 - 208 million years ago), in which the first small dinosaurs and mammals developed. The Triassic began after a major extinction had wiped out most of the life forms on Earth. The end of the Triassic was also marked by a worldwide extinction, although minor in comparison. www.enchantedlearning.com /subjects/dinosaurs/mesozoic   (725 words)

Late Palaeozoic and Early Mesozoic Circum-Pacific Events and their Global Correlation - Cambridge University Press Transgressive conodont faunas of the Early Triassic: an opportunity for correlation in the Tethys and circum-Pacific Rachel K. Paull and Richard A. Paull; 19. Triassic biostratigraphy and palaeobiography of East Asia Yin Hongfu; 20. Classification and correlation of Triassic limestones in Sikhote-Alin (on the basis of corals) Tatiana A. Punina; 21. www.cup.cam.ac.uk /uk/catalogue/catalogue.asp?isbn=0521025974   (699 words)

Fossil Record of the Archosauria The first archosauromorphs (relatives of the true archosaurs) appear in the fossil record in the Early Triassic; about 245 million years ago, just after the great end-Permian extinction. Many of these early groups are limited to the Triassic period, not enduring the extinctions in the Late Triassic that the dinosaurs and other taxa survived. The Late Triassic (about 225 million years ago) witnessed the appearance of several new groups of archosaurs, some of which have living descendants today. www.ucmp.berkeley.edu /diapsids/archofr.html   (335 words)

Permian - Triassic - GCR block   (Site not responding. Last check: 2007-11-04) The Triassic succession of Great Britain is divided into a number of stratigraphical units that are generally hard to assign confidently to the Lower, Middle, and Upper Triassic divisions. The upper boundary of the Triassic System is defined by the base of the Jurassic System, which is internationally recognized as being at the base of the planorbis subzone of the planorbis Ammonite Zone of the Hettangian Stage. The magnitude of the crisis is indicated by the recovery phase in the Triassic Period. www.jncc.gov.uk /earthheritage/gcrdb/GCRblock.asp?block=70   (1969 words)

Mesozoic Cynognathus crateronotus, a therapsid from the Early Triassic (230-225 mya), Cape Province, South Africa. Kayentatherium, a reptilian ancestor of the mammals from the Late Triassic of Arizona (210-200 mya). Trilophosaurus, a Triassic euryapsid (skull similar to the aquatic reptiles) resembles a large lizard in body form, but has a turtle-like head with a toothless beak. www.gpc.edu /~pgore/geology/geo102/mesozoic.htm   (516 words)

TRIASSIC ERA At the beginning of the Triassic period, Pangaea is still intact. The climate of the Triassic era was definitely influenced by Pangaea: An asteroid impacting the environment is another possible cause, but the fact that there is no evidence for one hitting the earth at the late Triassic/ early Jurassic time boundary greatly limits this hypothesis. www.denison.edu /biology/bio380-2001/triassic.html   (856 words)

Subsidence characteristics of the Turpan Basin (NW China) and its tectonic implications The highest rates of subsidence were present throughout the Late Permian and Early Triassic periods, active tectonic subsidence throughout the Middle Triassic and Jurassic, relatively reduced activity during the Cretaceous period and increased activity in the Early Tertiary. During the Middle Triassic and Early Tertiary, the total subsidence rate of the basin is generally in a high scale, although the tectonic subsidence is obviously less than before. The flexural subsidence was throughout the Middle Triassic to Early Tertiary. www.essc.psu.edu /~bjhaupt/papers/nat-sci98.sslh/natsci98.html   (2300 words)

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