To it belong the celebrated large Ichthyosauri and Plesiosauri of the oolitic and chalk periods, and the older Simosauri of the Trias period, all of which are more closely allied to Fish than to Amphibious animals.
However, remains of both are found in the oolitic period.
For we know of a number of doubtful and not accurately definable fossil remains of plants from the Oolitic and Trias (sic) periods, which some botanists consider to be Monocotylae, whilst others consider them as Gymnosperms.
The Serpent Dragons (Plesiosauria) lived in the oolitic and chalk periods together with the Ichthyosauria.
It is not ten years since we became acquainted with the imperfect impression of a bird in the Jurassic or Oolitic system, the knowledge of which has been of the very greatest importance for the phylogeny of the whole class of birds.
Well-striated surfaces are found on the harder rocks, as, for example, on the oolitic limestone at Dunston, near Lincoln.
The duration of the Oolitic period must have been considerable.
What are the three divisions of the Oolitic system?
It was carnivorous, and was undoubtedly the largest and most formidable animal existing in the earlier part of the oolitic period.
The Wealden, the highest member of the oolitic system, is an estuary deposit, consisting of calcareous beds, followed by sandstone, and terminated by the Wealden clay.
Some of the limestones have an oolitic structure, and the whole system takes its name from this circumstance, though this structure is not found in all parts of it, and is often found in other formations.
Deslongchamps, carrying from the sea in its mouth a Geoteuthis, a species of Calamary of the Oolitic epoch.
Now, as there exists every gradation of size between the smallest oolitic grains and the largest concretions, it is reasonable to suppose that the oolites are equally the product of concentration.
The Middle Lias, commonly known as the Marlstone, is surmounted by a bed of oolitic ironstone, largely worked in Leicestershire and in the north of England as a valuable ore of iron.
The Megalosaurus, the earliest appearance of which is among the more ancient beds of the Liassic and Oolitic series, is again found at the base of the Cretaceous rocks.
The Oolitic seas of this series contained Fishes belonging to the genera Asteracanthus, Strephodes, Lepidotus, and Microdon.
The animals which lived on the land during the Lower Ooliticperiod would be nearly the same with those of the Liassic.
But these local facts cannot be made to apply to the whole extent of the oolitic formations.
The second section of this series consists of theoolitic limestone of Portland, which is quarried in the Isle of Portland and in the cliffs of the Isle of Purbeck in Dorsetshire, and also at Chilmark in the Vale of Wardour, in Wiltshire.
In the eastern part of the Alps, some of the Palaeozoic strata, as well as the older Mesozoic formations, including the oolitic and cretaceous rocks, are distinctly recognisable.
The real nature of the shell, of which there are many species in oolitic rocks, is still a matter of conjecture.
The Oolite was so named because in the countries where it was first examined the limestones belonging to it had an Oolitic structure (see Chapter 3).
The alternation, on a grand scale, of distinct formations of clay and limestone has caused theoolitic and liassic series to give rise to some marked features in the physical outline of parts of England and France.
At Brora, in Sutherlandshire, a coal formation, probably coeval with the above, or at least belonging to some of the lower divisions of the Oolitic period, has been mined extensively for a century or more.
They are of Silurian, Carboniferous or Oolitic origin, the Kimeridge shale associated with the last-named being very valuable in this respect.
The 'Oolitic clays,' which are also Jurassic, usually contain limestone in the form of nodules, but are nevertheless important.
While with Mr Weddell, Williamson contributed a number of descriptions and drawings of oolitic plants to Lindley and Hutton's Fossil Flora.
Witham's earlier papers were embodied in his book: The Internal Structure of Fossil Vegetables found in the Carboniferous and Oolitic deposits of Great Britain, described and illustrated, 1833.
The character of the ground was very rocky, of an oolitic limestone, and having many hollows on its surface.
Having arrived at the hills, in about three miles, we found them abundantly grassed, but very rugged and rocky, of an oolitic limestone formation, with occasionally a light reddish soil covering the rock in the flats and valleys.
The surface rock is invariably an oolitic limestone, mixed with an imperfect freestone, and in some places exhibits fossil banks, which bear evident marks of being of a very recent formation.
The two implements occurred at the depth of 13 feet from the surface of the soil, and rested immediately on solid beds of Oolitic limestone, as represented in the accompanying section (Figure 23).
Hebert has demonstrated that, during the Oolitic and Cretaceous periods, similar inequalities in the vertical movements of the earth's crust took place in Switzerland and France.
They are also found in Egypt, and we have specimens of the same sort from Lyria, in a limestone apparently belonging to the oolitic or Jura formation.
Besides the more typical Oysters, the Oolitic rocks abound in examples of the singularly unsymmetrical forms belonging to the genera Exogyra and Gryphoea (fig.
Slice of arenaceous and oolitic limestone from the Carboniferous series of Shap, Westmoreland; magnified.
As now restricted, however, the genus Pterodactylus is more Cretaceous than Jurassic, and it is associated in the Oolitic rocks with the closely allied genera Dimorphodon and Rhamphorhynchus.
Introduction to the Monograph of the Oolitic Asteriadæ' (Palæontographical Society).
Oolitic Reptile, and, like the preceding, must have lived mainly or exclusively in the sea.
Supplement to the Corals of the Oolitic Formation' (Palæontographical Society).
Slice of oolitic limestone from the Jurassic series (Coral Rag) of Weymouth; magnified.
Oolitic limestone, structure of; mode of formation of.
There are large tracts on the globe, as in Russia and the United States, where all the members of the oolitic series are unrepresented.
In the eastern part of that chain, some of the primary fossiliferous strata, as well as the older secondary formations, together with the oolitic and cretaceous rocks, are distinctly recognizable.
On each side of the basin of the Limagne, both on the west at Gannat, and on the east at Vichy, a white ooliticlimestone is quarried.
It is worthy of remark that the Equisetum columnare of these Virginian rocks appears to be undistinguishable from the species found in the oolitic sandstones near Whitby in Yorkshire, where it also is met with in an upright position.
The Upper oolitic system of the above table has usually the Kimmeridge clay for its base; the Middle oolitic system, the Oxford clay.
In the uppermost part of this bed Mr. Forbes discovered the first echinoderm as yet known in the Purbeck series, a species of Hemicidaris, a genus characteristic of the Oolitic period.
This immediate covering, this suppression of interposed soils, this simplicity of structure and absence of oolitic strata, have been equally observed in Upper Silesia and in the Pyrenees.
The mineral often occurs in cleavable masses with a coarse or fine granular texture; also in botryoidal or globular (sphaerosiderite) and oolitic forms.
The clay ironstone so extensively worked as an ore of iron occurs as nodules and beds in the Coal Measures of England and the United States, and the oolitic iron ore of the Cleveland district in Yorkshire forms beds in the Lias.
Masses of white, finelyoolitic rock are attached to the outside of some of these coated pebbles.
With regard to Brachyphyllum, I have not yet had it in my power to study them in a natural state; but the figures given of them leave little doubt as to their analogy with the species of the Oolitic epoch.
On the island beaches coral sand is forming oolitic limestone, and the white coral mud with which the sea is milky for miles about the reef in times of storm settles and concretes into a compact limestone of finest grain.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "oolitic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
