How To Use Paleozoic In A Sentence
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The search for the rootstock of the decapod Crustacea has resulted in the discovery of numerous Paleozoic organisms that bear some similarity to Mesozoic and Cenozoic shrimp, lobsters, and crabs.
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Paleozoic synapsids have been the focus of many large-scale treatments over the past century and their anatomy and interrelationships are well known.
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The lithologic mosaic is distinct from the Paleozoic rocks of Ecoregion 36 and the strictly Quaternary deposits of Ecoregion 73.
Ecoregions of Arkansas (EPA)
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Carbonate-rich Paleozoic bedrock characterizes the geology of the Mixedwood Plains.
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Among crustacea, it is very remarkable that trilobites and limulus-like forms are the only representatives of the class during the paleozoic ages; that macrourans prevailed in the same manner during the secondary period; and that brachyurans make their appearance only in the tertiary period.
Louis Agassiz His Life and Correspondence
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The dissolution of limestones in weak acid is now a standard palaeontological laboratory technique, and has been used extensively to isolate phosphatic microfossils of all types from Paleozoic carbonates.
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In the northern Cordillera lower Paleozoic alkalic and potassic mafic magmatism is linked with rifting of the Selwyn Basin.
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Cephalopods were among the most highly developed animals and the topmost predators in the free water column during long intervals of the Paleozoic.
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The folded Ouachita Mountains (36) are underlain by Paleozoic sandstone, shale, and chert and mostly covered by pine – upland hardwood forests.
Ecoregions of Oklahoma (EPA)
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Sphenothallus Hall, 1847 is a widespread Paleozoic marine taxon that has been interpreted most recently as a tubiculous annelid or other ‘worm’ or as a thecate hydrozoan or scyphozoan cnidarian.
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Müller & Tsuji, Impedance-Matching Hearing in Paleozoic Reptiles: Evidence of Advanced Sensory Perception at an Early Stage of Amniote Evolution, PLoS ONE 2007.
A Decade Spanning Single Exchange
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The Chelicerates include among their number both the tiniest (the microscopic Acari or mites) and the hugest (the giant Paleozoic Eurypterida) of all the Arthropoda.
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Late Paleozoic tectonics and paleogeography of the ancestral Front Range: Structural, stratigraphic, and sedimentologic evidence from the Fountain Formation (Manitou Springs,
EurekAlert! - Breaking News
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It is a widespread Paleozoic marine taxon that has been interpreted most recently as a tubiculous annelid or other ‘worm’ or as a thecate hydrozoan or scyphozoan cnidarian.
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Further, adambulacralambulacral articulation is distinct between Zoroaster and the superficially similar Paleozoic species, and ambulacral form also is distinctive.
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The metamorphic rocks along the northwest margin of the Reading Prong, as well as the adjacent Paleozoic carbonates, contain epigenetic minerals deposited predominantly in open spaces.
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It is also highly unusual to discover these Paleozoic relics associated with decapods as they normally inhabit different environments.
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Other mature modifications, such as change in the shape of the peristome, are also inconsistently observed in Paleozoic ammonoids.
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Alternately, the Galician-Portuguese Western extreme of the ecoregion is characterized by lower smooth elevations, which correspond to very old massifs shaped by the late Paleozoic Hercynian orogeny.
Cantabrian mixed forests
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Mite wood borings in the Paleozoic are primarily known from coal ball permineralizations and silicified peat which was deposited in swampy environments.
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Some of the large sphenophyte trees of the Paleozoic were heterosporous, producing large megaspores and small microspores, and probably retaining the megaspore in the strobilus.
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Autunite is relatively abundant locally in Paleozoic-age sedimentary rocks in the vicinity of Jim Thorpe, Carbon County, Pennsylvania, where it is associated with carnotite and a variety of other uranium minerals.
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Crinoids, together with brachiopods, dominated the Paleozoic sessile benthos.
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The beginning of the Paleozoic is the definitional start of the Edenic Period, a time span in evolutionary biology that demarcates the initial time taken for the computation of background extinction rates of biota; the Edenic Period is taken to end with the ascent of modern man (e.g. approximately 50,000 to 10,000 years before present).
Paleozoic
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A friend of mine asked his invert prof. one that works int he Paleozoic what it might be and he thinks it is a nautiloid cephalopod irregularly sectioned, similar to Gonioceras occidentale.
Any ideas?
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By the end of the Paleozoic, cycads, glossopterids, primitive conifers, and ferns were spreading across the landscape.
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The second volume of the geological record, called the Paleozoic (Greek, PALAIOS, ancient; ZOE, life), has come down to us far less mutilated and defaced than has the first volume, which contains the traces of the most ancient life of the globe.
The Elements of Geology
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Conodonts were mostly small, elongate, eel-shaped marine animals that inhabited a variety of environments in Paleozoic and Triassic seas.
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Later, Spencer recognized two new orders and three new suborders for the Paleozoic families.
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The group was the principal epifauna of the Paleozoic.
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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.
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We acknowledge that virtually all Paleozoic calcareous foraminifers are diagenetically altered.
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Blake, Tintori, and Hagdorn and Blake and Hagdorn restudied the scanty Triassic record in light of that of the late Paleozoic.
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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.
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Georgetown is still on top, as they've been since the late Paleozoic, although five other teams got first-place votes.
Atlantic 11 Week 9: Georgetown. Your Town.
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However, it has been pointed out that the presence of the articulamentum layer is often difficult to detect in the early fossils, since many Paleozoic polyplacophorans are silicified and incompletely preserved.
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At the museum, Cooper worked in contact with U.S. Geological Survey paleontologists whose concerns were brachiopods and Lower Paleozoic stratigraphy.
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The sharp, folded and faulted ridges of the Ouachita Mountains (36) are mostly covered in pine – upland hardwood forest and underlain by Paleozoic sandstone, shale, and novaculite (chert).
Ecoregions of Arkansas (EPA)
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They lived through "Paleozoic" time, which, according to Dana, represents twelve of the sixteen parts of all geological time, beginning with the Primordial; or, calling the whole geological time 48 millions of years, the trilobites lived 36 million of years, or three-fourths of all geological time.
Evolution An Investigation and a Critique
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Many dendroid colonies in lower Paleozoic trepostomes developed narrow exozones of young presumably feeding autozooids in cycles that covered growing branch tips.
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Paleoproterozoic igneous and metamorphic rocks along with Paleozoic sedimentary rocks make up the basement complex of the San Juan Mountains of southwestern Colorado.
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Fifthly, the Trilobita is by far the best-represented arthropod group within Paleozoic rocks, from an important interval in the evolutionary history of the phylum Arthropoda.
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All the bones were disarticulated, but looked as though they'd come from Martian analogs of Late Paleozoic sarcopterygians and temnospondyls.
One of those WoW things.
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 Terry makes several jumps in time — to Siberia, then to the British Isles, then to the Paleozoic era and then to 2026 — where he finds himself with an aged Eric Bellmont.
New episode of Time Jumper arrives on iTunes | Major Spoilers - Comic Book Reviews and News
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Early Paleozoic land plants, land animals, and paleosols have been considered in terms of the breeder-competitor-tolerator trichotomy in nonquantitative terms.
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Many of the taxa that apparently diverged in the Paleozoic now are limpets and retain little information about the morphologies of their coiled ancestors.
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To return to our example, the usual biostratigraphic markers in Middle Paleozoic stratigraphy are graptolites, conodont ‘jaw’ parts, and thelodont scales.
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Many Paleozoic forms, now extinct, had very unusual morphologies.
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Many crinoids are primarily nocturnal but they are seen during the day with their arms rolled up. living fossil existing virtually unchanged from the ancestors in the geologic age known as the Ordovician Period, but there are many more fossils formed from the Paleozoic Era.
CreationWiki - Recent changes [en]
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There are two main groups of fossil stromatoporoids that lived in different eras, the Paleozoic and the Mesozoic.
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Conodont elements, the disarticulated bony remains of the complex conodont oral apparatus, are found as microfossils by the tens of thousands in virtually every Paleozoic marine sediment, everywhere in the world.
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The mountain ranges (sky islands) are a geologic mix of Tertiary volcanic and intrusive granitic rocks, Paleozoic sedimentary layers, and some Precambrian granitic plutonic rocks.
Ecoregions of New Mexico (EPA)
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In the Tintic district of central Utah, Paleozoic limestones have been intruded by monzonite (an acid granitic or porphyritic igneous rock), and covered by surface flows, the flows for the most part having been removed by subsequent erosion.
The Economic Aspect of Geology
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The dissolution of limestones in weak acid is now a standard palaeontological laboratory technique, and has been used extensively to isolate phosphatic microfossils of all types from Paleozoic carbonates.
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Myriapod animals were probably one of the invertebrate animal groups that first colonized the terrestrial ecosystem during Early Paleozoic.
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You can almost hear giant Paleozoic dragonflies pausing to the mechanical alien sound of the watch.
But a Moment Ago « A Fly in Amber
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This family of reptiles is allied to the living monitor, and its appearance in a primary or paleozoic formation, observes Prof. Owen, is opposed to the doctrine of the progressive development of reptiles from fish, or from simpler to more complex forms; for, if they existed at the present day, these monitors would take rank at the head of the Lacertian order.
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Later Paleozoic seas were dominated by crinoid and blastoid echinoderms, articulate brachiopods, graptolites, and tabulate and rugose corals.
Paleozoic
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The Sedimentary Subalpine Zone ecoregion is found southeast of Yellowstone National Park, in the overthrust belt, and in the northwest corner of the Bighorn Mountains in areas underlain by faulted and folded Mesozoic and Paleozoic sedimentary rocks (limestone, dolomite, shale, and sandstone).
Ecoregions of Wyoming (EPA)
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In summary, clymeniids fell well within the general range of Paleozoic ammonoid geometries, though most members of the Clymeniida tended toward an openly coiled shell with a low expansion rate.
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There are great bifurcations as yet on the structural environment and on the evolution of the Xingmeng Paleozoic orogenic belt in Southeast Inner Mongolia during the Carboniferous Period.
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The articulate brachiopods, which would dominate the marine environment in the later Paleozoic, were still relatively rare and not especially diverse.
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In addition to the dominant Precambrian and Paleozoic rocks, there are small deposits of Mesozoic rocks on the island as well.
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The Triassic ammonoids represent the phylogenetic bridge between Paleozoic and Jurassic ammonoids.
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An unpaired commonly enlarged interbrachial ossicle, the axillary, occurs in most Paleozoic asteroids, including those treated here.
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It was a fissure filling of Paleozoic, probably Permian, age.
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This paper is the first in a series of studies re-describing echinoderm taxa from these biogeographically important Paleozoic assemblages.
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The largest would be the ‘Permo-Triassic’ extinction, between the Permian and Triassic periods, of the Paleozoic and Mesozoic eras.
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The Ouachitas are made up of ridges, hills, and valleys formed by the erosion of folded and faulted Paleozoic sandstone, shale, and chert, known locally as novaculite.
Ecoregions of Arkansas (EPA)
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However, it is hardly an unsolvable mystery: remember that there were plants with sap, leaves, seeds, spores and pollen in the Paleozoic, long before flowering plants appeared.
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It was indeed supposed by some of the earlier observers, that the granite of Christiania, in Norway, was intercalated in mountain masses between the primary or paleozoic strata of that country, so as to overlie fossiliferous shale and limestone.
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Erect forms were much more common in the Paleozoic than they are now; the majority of today's bryozoan species are encrusting.
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The astragalus of diadectids is identical to those of late Paleozoic terrestrial amniotes in structure and relationship to neighboring elements.
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Most Paleozoic insects are known only by their wing venation since wings are the least degradable parts of insects.
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The productive Paleozoic era gave rise to hard-shelled organisms, vertebrates, amphibians, and reptiles.
February 2009
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The Strophomenata are a wholly Paleozoic class; one of the two classes of advanced articulate brachiopods.
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But whenever I read it it calls forth for me an image that surely was nothing at all like what Eliot had in mind: that silent sea is, for me, the paleozoic one of the Cambrian or Silurian period of four hundred million years ago, and the owner of that pair of ragged claws is the curious mud-crawling creature known as a _eurypterid, _ a vaguely lobsterish thing that reached lengths of eight feet and more.
Asimov's Science Fiction
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The Mid-Elevation Sedimentary Mountains ecoregion includes sections of the Teton and Wyoming ranges, and areas in the overthrust belt underlain by faulted and folded Mesozoic and Paleozoic sedimentary rocks (limestone, dolomite, shale, and sandstone).
Ecoregions of Wyoming (EPA)
