Lower carboniferous sentence example

lower carboniferous
  • In the extreme north-east are found the oldest rocks in the state - lower Devonian (the New Scotland beds of New York) and, not so old, an extension of the Lower Carboniferous which underlies the Warrior coalfields of Alabama, and which consists of cherts, limestones, sandstones and shales, with a depth of 800 to 900 ft.
    0
    0
  • It is, however, likely that this formation occurs in Greenland, for in Dana Bay, Captain Feilden found a species of Spirifera and Productus mesolobus or costatus, though it is possible that these fossils represent the " Ursa stage " (Heer) of the Lower Carboniferous.
    0
    0
  • At Cushendun, however, a coarse conglomerate is believed to be Devonian, while Lower Carboniferous Sandstones, with several coal-seams, form a small productive basin at Ballycastle.
    0
    0
  • The Coal-Measures and Millstone Grit are usually grouped together in the Upper Carboniferous, the Carboniferous Limestone series constituting the Lower Carboniferous.
    0
    0
  • In the eastern border of the Rhenish Schiefergebirge the Permian rests unconformably upon Lower Carboniferous rocks.
    0
    0
    Advertisement
  • In Colorado the Lower Carboniferous is only 400-500 ft.
    0
    0
  • In the Lower Carboniferous the flora was composed of six great groups of plants, viz.
    0
    0
  • Farther south in the Donetz basin the coals only appear at the close of the Lower Carboniferous.
    0
    0
  • In the Lower Carboniferous rocks of Scotland intercalated volcanic rocks are strikingly abundant, and now form an important feature in the geology of the southern portion of that country.
    0
    0
  • In North America, the principal region of volcanic activity lay in the west; great thicknesses of igneous rocks occur in the Lower Carboniferous rocks of British Columbia, and from the middle of the period until near its close volcanoes were active from Alaska to California.
    0
    0
    Advertisement
  • Oil and gas are of importance in the Lower Carboniferous Pocono sandstone of West Virginia and in the Berea grit of Ohio, where brine also occurs.
    0
    0
  • In Lower Carboniferous times these mountains were snow-capped, and the valleys on their flanks were occupied by glaciers.
    0
    0
  • The Lower Carboniferous beds are represented by conglomerates and sandstones with some shales and limestones.
    0
    0
  • The Lower Carboniferous rocks also occur in the Blue Mountains, along the Cox river and Capertee river; and a northern continuation occurs along the western slope of the New England tableland, from the Macintyre river to the Queensland border.
    0
    0
  • Compared with the rugged and picturesque scenery of the Lower Carboniferous rocks, that of the Coal Measures is, as a rule, featureless and monotonous.
    0
    0
    Advertisement
  • The peninsula of Cornwall and Devon may be looked upon as formed from a synclinal trough of Devonian rocks, which appear as plateaus on the north and south, while the centre is occupied by Lower Carboniferous strata at a lower level.
    0
    0
  • Its central core of Lower Carboniferous rock is broadly displayed towards the north, while southward it contracts; on either side lie the younger rocks, the coal-fields, the Permian strata and the Triassic formations, the last-named, while sweeping round the southern extremity of the Carboniferous axis of the uplift from its eastern and western flanks, spread out in a large sheet over the midland counties.
    0
    0
  • Next, covering the north-eastern and south-western corners of the state, and connecting them with a narrow belt, are the lower Carboniferous measures (which also appear in a very narrow band along the Mississippi for some distance below St Louis).
    0
    0
  • of this line the Lower Carboniferous predominates.
    0
    0
  • Metalliferous veins are common, amongst the best-known being the silver-bearing lead veins of Klausthal, which occur in the Culm or Lower Carboniferous.
    0
    0
    Advertisement
  • Its lower part represents the Lower Carboniferous Shales and Sandstones of the central and northern areas, while its upper part corresponds with a portion of the Carboniferous Limestone.
    0
    0
  • The Lower Carboniferous Sandstones are conspicuous in the region from Milltown near Inver Bay in southern Donegal to Ballycastle in county Antrim.
    0
    0
  • In Bohemia and Moravia the whole of the beds from the Cambrian to the Lower Carboniferous are of marine origin; but after the Carboniferous period the area appears to have been dry land until the beginning of the Upper Cretaceous period, when the sea again spread over it.
    0
    0
  • The Lower Carboniferous rocks of Spain consist partly of limestones, and partly of shales, sandstones and conglomerates like the culin of Devonshire.
    0
    0
  • The Carboniferous system begins with a series of marine limestones, shales and grits, including a rich Lower Carboniferous fauna.
    0
    0
    Advertisement
  • A branched filamentous organism from the Lower Carboniferous of Scotland, described by Kidston under the name of Bythotrephis worstoniensis, shows some remains of cellular structure, and may probably be a true Alga, resembling some of the filamentous Florideae in habit.
    0
    0
  • In the Lower Carboniferous of Scotland Mr Kidston has found several specimens of a large dichotomous thallus, with a very distinct midrib; the specimens, referred to the provisional genus Thallites, much resemble the larger thalloid Liverworts.
    0
    0
  • Archaeocalamites appears to have had a similar structure, but in some specimens from the Lower Carboniferous of Burntisland, provisionally named Protocalamites pettycurensis, centripetal wood was present in the stem.
    0
    0
  • - The family Cheirostrobeae is only known from the petrified fructification (Cheirostrobus pettycurensis) derived from the Lower Carboniferous of Burntisland in Scotland.
    0
    0
  • The secondary wood in the Lower Carboniferous species, S.
    0
    0
    Advertisement
  • In the Lower Carboniferous of central Russia beds of coal occur consisting of the cuticles of a Bothrodendron, which are not fossilized, but retain the consistency and chemical composition of similar tissues in recent plants.
    0
    0
  • in the cone attributed to the Lower Carboniferous Lepidodendron Veltheimianum) the arrangement was that usual in Selaginella, the microsporangia occurring above and the megasporangia below in the same strobilus (diagram, fig.
    0
    0
  • A more important deviation from ordinary Lepidostroboid structure is shown by the genus Lepidocarpon, from the English Coal Measures and the Lower Carboniferous of Scotland.
    0
    0
  • Grievii, of Williamson, from the Lower Carboniferous of Scotland.
    0
    0
  • The family Calamopityeae, allied anatomically to Lyginodendreae, is of Devonian and Lower Carboniferous age.
    0
    0
    Advertisement
  • Corresponding strands of primary xylem have been observed in stems of the genus Pitys (Witham), of Lower Carboniferous age, which consisted of large trees, probably closely allied to Cordaites.
    0
    0
  • The evidence for terrestrial Silurian vegetation is still dubious; apart from some obscure North American specimens, the true nature of which is not established, Potonie has described well-characterized Pteridophytes (such as the fern-like Sphenopteridium and Bothrodendron among Lycopods) from supposed Silurian strata in North Germany; the horizon, however, appears to be open to much doubt, and the specimens agree so nearly with some from the Lower Carboniferous as to render their Silurian age difficult of credence.
    0
    0
  • For our present purpose we may divide the formation into Lower Carboniferous and Lower and Upper Coal Measures.
    0
    0
  • In the Lower Carboniferous (Culm of Continental authors) many Devonian types survive - e.g.
    0
    0
  • In Australia, South America and South Africa a few plants have been found which agree closely with Lower Carboniferous types of the northern hemisphere.
    0
    0
    Advertisement
  • In New South Wales, for example, we have such genera as Rhacopteris and Lepidodendron represented by species very similar to those recorded from Lower Carboniferous or Culm rocks in Germany, Austria, England, Spitzbergen, North and South America and elsewhere.
    0
    0
  • From strata in New South Wales overlying Devonian and Lower Carboniferous rocks certain plants were discovered in the early part of the 19th century which were compared with European Jurassic genera, and for several years it was believed that these plant-beds belonged to the Mesozoic period.
    0
    0
  • The extraordinary abundance of Glossopteris in PermoCarboniferous rocks of Australia, and in strata of the same age in India and South Africa, gave rise to the term " Glossopteris flora for the assemblage of plants obtained from southern hemisphere rocks overlying beds containing Devonian and Lower Carboniferous fossils.
    0
    0
  • This flora appears to have abruptly succeeded an older flora in Australia and elsewhere, which was precisely similar to that of Lower Carboniferous age in the northern hemisphere.
    0
    0
  • While a few similar or even identical types may be recognized in both floras, there can be no doubt that, during a considerable period subsequent to that represented by the Lower Carboniferous or Culm rocks, there existed two distinct floras, one of which had its headquarters in the northern hemisphere, while the other flourished in a vast continental area in the south.
    0
    0
    Advertisement
  • In the southern hemisphere the Glossopteris flora succeeded a Lower Carboniferous vegetation with a rapidity similar to that which marked the passage in the north from Palaeozoic to Mesozoic floras.
    0
    0
  • The headland is a sill, mainly composed of dolerite which was intruded horizontally during the Tertiary into gently dipping lower carboniferous shales.
    0
    0
  • In the north-western Highlands masses of white quartzite, resting unconformably in Torridonian sandstone, run from Loch Eriboll to Skye, forming in places great conical hills and some L J Recent & Pleistocene F l Cretaceous Jurassic Trias Granite & Acid Intrusive Rocks' Permian Coal Measures, Carboniferous Millstone Grit Series Lower Carboniferous Old Red Sandstone & Devonian Silurian Ordovician Cambrian Scale, z:4,600.000 English Miles o xxxx xzxx xxxx Metamorphic Group Volcanic Rocks ® Basic Intrusive Rocks 'I +++ +++ ob.o times capping isolated mountains of red Torridon sandstone.
    0
    0
  • Trios Permian Coal Measures, Carboniferous Millstone Grit Series & Culm Lower Carboniferous r --????
    0
    0
  • The headland is a sill, mainly composed of dolerite which was intruded horizontally during the Tertiary into gently dipping lower Carboniferous shales.
    0
    0
    Advertisement
  • Europe generally, the principal coal seams occur in the Upper Carboniferous, while the Lower Carboniferous is mainly composed of marine deposits, with, however, the first bed of coal near its summit.
    1
    1