In the absence of fossils their age cannot be determined.
All the strata intersected by the Rhine between Bingen and Bonn contain fossils of the same classes.
A long list of fossils has been obtained from Umkivelane Hill, Zululand.
The fossils show many notable affinities with those in the Lower Cretaceous of the Pyrenees.
The ethnographical museum, the cabinet of coins, and the collections of fossils, minerals, and physical and optical instruments, are also worthy of mention.
No fossils have been discovered, and except that they represent some portion or portions of rocks of the Pre-Cape formation the age of the upper Witwatersrand beds, as well as that of the lower division, remains an open question.
The Grand Gulf group, of formations of different ages, consisting of sands, sandstones and clays, and showing a few fossil plants, but no marine fossils, extends southward from the last to within a few miles of the coast, and is 750-800 ft.
In Zululand they are chiefly anthracitic. The fossils include several species of Glossopteris among them: Glossopteris ' See C. L.
They are exceedingly prolific in fossils which prove them to be of Upper Cretaceous age.
Gneiss and granite occur; Ordovician fossils have been found in the Upper Shan States, and Carboniferous fossils in Tenasserim and near Moulmein.
At Marbat the granite is overlaid by sandstone, presumably the Nubian sandstone: this is followed by marls containing Cenomanian fossils; and these are overlaid by Upper Cretaceous limestones, upon which rest isolated patches of Alveolina limestone.
In the centre of the folds fossiliferous beds with crinoids have been found, and the black slates at the top of the series contain Myophoria and other fossils, indicating that the rocks are of Triassic age.
The Trilobites are known only as fossils, mostly Silurian and prae-Silurian; a few are found in Carboniferous and Permian strata.
By the late 1800s, superphosphates were all the rage and eighty factories were manufacturing this high-yield fertilizer from coprolites (that is, phosphate-rich fossils of ancient animal dung—I kid you not).
The limestone has yielded Proetus, Chonetes and other fossils, and is believed to be of Carboniferous age.
In the sandstone Myophoria and other Triassic fossils have been found, and it appears to belong to the Rhaetic or Upper Trias.
The older rocks are early Tertiary or late Cretaceous but there are no fossils to indicate age.
- This order has been constituted for a peculiar group of palaeozoic fossils, which have been interpreted as the remains of the skeletons of Hydrozoa of an extinct type.
The distribution of fossils frequently makes it possible to map out approximately the general features of land and sea in long-past geological periods, and so to enable the history of crustal relief to be traced.'
Thick, containing rolled fossil bones, cetacean and fish teeth, and shells of the Crag period, with nodules or pebbles of phosphatic matter derived from the London Clay, and often investing fossils from that formation.
They are at a depth of about 12 ft., in slaty shale containing Llandeilo fossils and contemporaneous felspathic ash and scoriae.
It is no exaggeration to say that the genus, often even the species, can be determined from almost any recent bone, but in the case of Miocene, and still more, of Eocene fossils, we have often to deal with strange families, which either represent an extinct side branch, or which connect several recent groups with each other.
Russia, rich in salt-springs, but very poor in fossils, are now held by most Russian geologists to be Triassic. The Permian deposits contain marine shells and also remains of plants similar to those of England and Germany.
The loess covers both the watersheds and the valleys.
He presented to the Ashmolean museum, Oxford, a variety of fossils and antiquities, which he had described in his works, and received the thanks of the university and the degree of LL.D.
Borlase was well acquainted with most of the leading literary men of the time, particularly with Alexander Pope, with whom he kept up a long correspondence, and for whose grotto at Twickenham he furnished the greater part of the fossils and minerals.
The public buildings include the town hall, a fine and commodious house on the site of the old tolbooth; the Falconer museum, containing among other exhibits several valuable fossils, and named after Dr Hugh Falconer (1808-1865), the distinguished palaeontologist and botanist, a native of the town; the mechanics' institute; the agricultural and market hall; Leanchoil hospital and Anderson's Institution for poor boys.
The later beds of the island belong to the Jurassic, Cretaceous and Tertiary systems. At the western foot of the Ida massif calcareous beds with corals, brachiopods (Rhvnchonella inconstans, &c.) have been found, the fossils indicating the horizon of the Kimmeridge clay.
Fossils are abundant, and forty species are recorded.
Its marine fossils are admirably preserved, and one hundred and eight species have been described.
Basilosaurus (or Zeuglodon) bones are found only in the Jackson marls, and other marine fossils are abundant.
The crystalline rocks are succeeded by beds which have been referred to the Cambrian and Silurian systems. In the valley of the Trombetas, one of the northern tributaries of the Amazon, fossils have been found which indicate either the top of the Ordovician or the bottom of the Silurian.
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.
The facies of the fossils is, according to Mr Etheridge, North American and Canadian, though many of the species are British.
On the south coast of the same island are coarse-grained, brownish micaceous and light-coloured calcareous sandstone and marls, containing fossils, which render it probable that they are of the same age as the coal-bearing Jurassic rocks of Brora (Scotland) and the Middle Dogger of Yorkshire.
Dr Madsen has recognized fossils that correspond with those from the Inferior oolite, Cornbrash and Callovian of England.
Two houses of the 16th century, the Hotel d'Estrades and the Hotel de Vaurs, are used as the museum, which has a rich collection of fossils, prehistoric and Roman remains, and other antiquities and curiosities.
These ancient rocks have hitherto yielded no fossils and their age is therefore uncertain, but they are probably pre-Cretaceous at least.
From the evidence of fossils it seems that the higher sub-order - Apocrita - can be traced back to the Lias, so that we believe the Hymenoptera to be more ancient than the Diptera, and far more ancient than the Lepidoptera.
The Devonian rocks of Canada (New Brunswick) have yielded several fossils which are undoubtedly wings of Hexapods.
In the paraschists, though fossils are exceedingly rare, sedimentary structures such as bedding and the alternation of laminae of fine and coarse deposit may frequently be preserved.
Excepting in the extreme north, where marine Jurassic and Cretaceous fossils have been found, there is no evidence that this part of Siberia has been beneath the sea since the early part of the Palaeozoic era.