How to use Paleozoic in a sentence

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Sentence Examples In the northern Cordillera lower Paleozoic alkalic and potassic mafic magmatism is linked with rifting of the Selwyn Basin. There are two main groups of fossil stromatoporoids that lived in different eras, the Paleozoic and the Mesozoic. Conodonts were mostly small, elongate, eel-shaped marine animals that inhabited a variety of environments in Paleozoic and Triassic seas. We acknowledge that virtually all Paleozoic calcareous foraminifers are diagenetically altered. It is also highly unusual to discover these Paleozoic relics associated with decapods as they normally inhabit different environments. By the end of the Paleozoic, cycads, glossopterids, primitive conifers, and ferns were spreading across the landscape. They are very abundant in some Paleozoic formations and include useful index fossils. Later, Spencer recognized two new orders and three new suborders for the Paleozoic families. Other mature modifications, such as change in the shape of the peristome, are also inconsistently observed in Paleozoic ammonoids. The early tetrapods of this time were amphibian-like animals that eventually gave rise to the reptiles and synapsids by the end of the Paleozoic. In addition to the dominant Precambrian and Paleozoic rocks, there are small deposits of Mesozoic rocks on the island as well. Most Paleozoic insects are known only by their wing venation since wings are the least degradable parts of insects. Crinoids, together with brachiopods, dominated the Paleozoic sessile benthos. This paper is the first in a series of studies re-describing echinoderm taxa from these biogeographically important Paleozoic assemblages. Carbonate-rich Paleozoic bedrock characterizes the geology of the Mixedwood Plains. The astragalus of diadectids is identical to those of late Paleozoic terrestrial amniotes in structure and relationship to neighboring elements. Although a relatively inconspicuous component of the modern flora, the lycopsids were arborescent ecosystem dominants in the late Paleozoic. An unpaired commonly enlarged interbrachial ossicle, the axillary, occurs in most Paleozoic asteroids, including those treated here. Blake, Tintori, and Hagdorn and Blake and Hagdorn restudied the scanty Triassic record in light of that of the late Paleozoic. The Triassic ammonoids represent the phylogenetic bridge between Paleozoic and Jurassic ammonoids. Show More Sentences Paleozoic synapsids have been the focus of many large-scale treatments over the past century and their anatomy and interrelationships are well known. Many of the taxa that apparently diverged in the Paleozoic now are limpets and retain little information about the morphologies of their coiled ancestors. Most Paleozoic crinoids lived attached to the sea-floor by a flexible stem, which may be either cemented to the sea-floor, or have a root-like system buried into the sediment. The articulate brachiopods, which would dominate the marine environment in the later Paleozoic, were still relatively rare and not especially diverse. Further, adambulacralambulacral articulation is distinct between Zoroaster and the superficially similar Paleozoic species, and ambulacral form also is distinctive. Paleoproterozoic igneous and metamorphic rocks along with Paleozoic sedimentary rocks make up the basement complex of the San Juan Mountains of southwestern Colorado. Cephalopods were among the most highly developed animals and the topmost predators in the free water column during long intervals of the Paleozoic. Early Paleozoic land plants, land animals, and paleosols have been considered in terms of the breeder-competitor-tolerator trichotomy in nonquantitative terms. Mite wood borings in the Paleozoic are primarily known from coal ball permineralizations and silicified peat which was deposited in swampy environments. Many Paleozoic forms, now extinct, had very unusual morphologies. Most Paleozoic insects are known only by their wing venation since wings are the least degradable parts of insects, so phylogenetic schemes will rely on venational characters. At the museum, Cooper worked in contact with U.S. Geological Survey paleontologists whose concerns were brachiopods and Lower Paleozoic stratigraphy. Rocks of late Precambrian and early Paleozoic age have yielded a variety of tiny spine-like fossils of dominantly organic or weakly phosphatic composition. It was a fissure filling of Paleozoic, probably Permian, age. Our data set includes only fossilized specimens and all of them are from an extinct genus of class Stenolaemata, the dominant Paleozoic class of bryozoans. Many dendroid colonies in lower Paleozoic trepostomes developed narrow exozones of young presumably feeding autozooids in cycles that covered growing branch tips. The is especially likely for earlier periods such as the Paleozoic and Proterozoic. Many deformed and metamorphosed rocks, mostly of Paleozoic age, surface within the Urals. Faghur North-1X logged 25 feet of net pay in the Safa and Paleozoic Desouqy sands. Throughout the early Paleozoic, that landmass was broken into a substantial number of continents. Show More Sentences Geologically, the Paleozoic started shortly after the breakup of the supercontinent Pannotia. The Paleozoic was a time of dramatic geological, climatic, and evolutionary change. Initial diversification of macroboring ichnofossils and exploitation of the macroboring niche in the lower Paleozoic. The Paleozoic comes after the Neoproterozoic era of the Proterozoic and is followed by the Mesozoic. The Caledonian orogeny was one of several orogenies that would eventually form the supercontinent Pangaea in the Late Paleozoic era. The Paleozoic comes after the Neoproterozoic Era of the Proterozoic Eon and is followed by the Mesozoic Era. The Parareptilia and synapsid amniotes were common during the late Paleozoic, while diapsids became dominant during the Mesozoic. Other classes and orders, now long extinct, also occur as fossils, particularly from the late Paleozoic and Mesozoic eras. This second period of the Paleozoic era created abundant fossils that became major petroleum and gas reservoirs. The first period of activity occurred during the Paleozoic era, with two periods of change. They are essentially fused plates which correspond to the parallel ambulacral plates in sea stars and five Paleozoic families of ophiuroids. In the Paleozoic era, brittle stars had open ambulacral grooves, but in modern forms, these are turned inward. They neared extinction at the end of the Paleozoic era, with just six species known from the Permian period. Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms. Many fish of the Paleozoic developed external armor that protected them from predators. The Antarctic Peninsula was formed by uplift and metamorphism of sea bed sediments during the late Paleozoic and the early Mesozoic eras. It is a texturally immature sedimentary rock generally found in Paleozoic strata. Common in some Paleozoic and Mesozoic strata, black shales were deposited in anoxic, reducing environments, such as in stagnant water columns. Plains make up much of the eastern portion of the West, underlain with sedimentary rock from the Upper Paleozoic, Mesozoic, and Cenozoic eras. The Permian spanned from 299 to 252 million years ago and was the last period of the Paleozoic Era. Show More Sentences The Central Lowlands is a rift valley mainly comprising Paleozoic formations. The Cambrian spans from 541 million years to 485 million years and is the first period of the Paleozoic era of the Phanerozoic. The organic-rich shales in the Lower Qusaiba constitute the main source rock for the kingdom's Paleozoic petroleum system. Regional metasomatic dolomitization associated with tectonic disturbances in Lower Paleozoic of the Northern Baltic region. While macroscopic plant life appeared early in the Paleozoic Eon and possibly late in the Neoproterozoic Era of the earlier eon. The earliest microfossil record is an admixture of redeposited Paleozoic spores and pollen from distant deglaciated sites. Transcurrent continental tectonics model for the Ossa-Morena Zone Neoproterozoic Paleozoic evolution, SW Iberian Massif, Portugal. Paleoclimatic studies and evidence of glaciers indicate that central Africa was most likely in the polar regions during the early Paleozoic. Life began in the ocean but eventually transitioned onto land, and by the late Paleozoic, it was dominated by various forms of organisms. But in Syria and Iraq, there are major unconformities between the Lower and Upper Paleozoic. Fish, arthropods, amphibians, anapsids, synapsids, euryapsids and diapsids all evolved during the Paleozoic. The early Paleozoic ended, rather abruptly, with the short, but apparently severe, late Ordovician ice age. The basement of the region is composed of Paleozoic metamorphosed rocks and Mesozoic ophiolites. The Narmer-1X and the Neilos field are elements of an emerging Paleozoic play pioneered in the Western Desert by Apache. The eastern slopes are relatively flat, with some hills and rocky outcrops and contain alternating volcanic and sedimentary layers dated to the middle Paleozoic Era. It received international sanction in 1960, when it was adopted as an official period of the Paleozoic Era by the International Geological Congress. The Devonian ended with a series of turnover pulses which killed off much of middle Paleozoic vertebrate life, without noticeably reducing species diversity overall. The Central Lowlands is largely underlain by Paleozoic formations. The Dalradian Supergroup consists of metasedimentary rocks which underwent polyphase deformation and metamorphism during the Precambrian and early Paleozoic. Burchfiel and Chen focus on the evolution of the 14 tectonic units in the region from middle Paleozoic to Recent, with a major emphasis on Mesozoic and Cenozoic time. Show More Sentences His research interests include the magnetic polarity time scale for pre-oceanic periods and changes in magnetic reversal frequency since the Paleozoic Era. Evidence for pollination-drop mechanism in Paleozoic pteridosperms. This book presents a detailed picture of the evolution of the South Caspian and North to Central Iran basins during the Late Paleozoic and Cenozoic eras. Evidence for a pollination-drop mechanism in Paleozoic pteridosperms. The geological substrate of the caatinga is severely eroded crystalline bedrock of the Precambrian Brazilian Shield and Paleozoic and Mesozoic sedimentary basins. Paleozoic echinoids probably inhabited relatively quiet waters. A noteworthy feature of Paleozoic life is the sudden appearance of nearly all of the invertebrate animal phyla in great abundance at the beginning of the Cambrian. The Ordovician saw the highest sea levels of the Paleozoic, and the low relief of the continents led to many shelf deposits being formed under hundreds of metres of water. The next two periods of the Paleozoic era, the Ordovician and Silurian, were named after ancient Celtic tribes from this area based on Murchison's and Sedgwick's work. The earliest geological period of the Paleozoic era, the Cambrian, takes its name from the Cambrian Mountains, where geologists first identified Cambrian remnants. His research interests include ichnology and geology of the lower Paleozoic of north Wales, the Paleozoic of eastern Canada and Maine, and the Cenozoic of the Antilles. There are many unanswered questions about the late Paleozoic. Examples from Classical Literature The period following on after Archean time is called, by geologists, Paleozoic time. The coal we burn to-day is mainly the remains of the wonderful growth of the flowerless vegetation of the Paleozoic Ace. It is but a glimpse we get into the immeasurable distance of the Paleozoic. See what it means to tell these kids about the Paleozoic age and sich, Ruthie! But, toward the close of the Paleozoic time, we meet with representatives of the backbone family. The class Mammalia, to which man belongs, had no representative on the earth during the extended Paleozoic time. Carlin-type gold mineralization occurs here in Paleozoic carbonaceous siltstones, shales and limestones. Carlin-type gold mineralization occurs in Paleozoic carbonaceous limestones, shales and siltstones. The Paleozoic era witnessed the first appearance of vertebrate life. AngloGold drilled a deep hole at the Hatter prospect, east of the Hollister open pit, and penetrated lower Paleozoic rocks and a granitic intrusive of possible Mesozoic age. The screen is energy always in motion and perhaps that constant flicker excites some long-dormant Paleozoic hunter's pathway in our medulla oblongata. The geology of the study sites consists predominantly of Paleozoic granitic intrusions with detrital sedimentary rocks and low grade metamorphosed sediments. To me, these narrow rockbound defiles, with their horizontal ribbing of Paleozoic strata, define the Illinois landscape every bit as much as the prairies. Find more words! 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