Defn: A calcareous tufa, in part crystalline, occurring on a large scale as a shore deposit about the Quaternarylake basins of Nevada.
Defn: A quaternary deposit, usually consisting of a fine yellowish earth, on the banks of the Rhine and other large rivers.
Defn: An extinct quaternary mammal, of great size, allied to the sloth.
The species were mostly larger than elephants, and their romains occur in nearly all parts of the world in deposits ranging from Miocene to late Quaternary time.
Defn: An extinct South American quaternary mammal, allied to the armadillos.
The terms Secondary, Tertiary, and Quaternary rocks have also been used in like manner, but of these the last two only are now in use.
Defn: An extinct gigantic quaternary mammal, allied to the ant-eaters and sloths.
Unless a river traverses a granite or slate country, no granite or slate is found in the Quaternary gravels of its valley: unless it passes over Oolite, Purbeck, or Greensand, no blocks or pebbles of these rocks occur.
There is no record of its having been associated with any remains of the Quaternary fauna.
Moreover, human bones are reported to have been discovered in these Quaternary beds, both in this country and in France.
Numerous mammalian remains of the same Quaternary fauna have been found along its course, especially at Barnwell and Chesterton,[2507] near Cambridge, where also land and freshwater shells occur in abundance.
There is a laboratory of invertebrate paleontology of Quaternary age, with a corps of paleontologists, Mr. Wm.
Perhaps the division may eventually grow to such an extent that its field of operations will include the whole Quaternary geology.
They told of events three thousand or, including the Egyptian hieroglyphic texts, seven thousand years old, but what was this compared with the immense lapse of time during which man has lived, going back into the Quaternary epoch?
This transition took place, probably, at the beginning of the quaternary period, or possibly in the tertiary.
The Anthropolithic, or Quaternary Epoch, constitutes the Age of Man and Cultivated Forests, and is made up of the Glacial and Postglacial Period, and the Period of Culture.
Along the coast, and in the lower parts of the river valleys, are deposits which are mainly Quaternary but may also include beds of Tertiary age.
So much, then, for theQuaternary Pampean mud interlaced with the bones of giant animals.
The thickness of this stratum varies considerably; it may average about 40 feet, and geologically it belongs to the Quaternary epoch, otherwise called Diluvian or Post-Pliocene.
At the quaternary period almost all the animals of our time had already seen the light, and a certain number of animal species existed, which were shortly to disappear.
They are ionized in aqueous solution to a much greater extent than ammonia, the quaternary ammonium bases being the most ionized, and the secondary bases being more strongly ionized than the primary or tertiary bases.
If the nitrogen atom in the quaternary ammonium salts be in combination with four different groups, then the molecule is asymmetrical, and the salt can be resolved into optically active enantiamorphous isomerides.
By the action of ammonia on the alkyl iodides a complex mixture of primary, secondary and tertiary amines, along with a quaternary ammonium salt, is obtained, the separation of which is difficult.
The broad platforms of the hamada are covered withQuaternary deposits.
The tertiary amines possess the power of combining with one molecular proportion of an alkyl iodide to form quaternary ammonium salts.
The existence of his remains, rare as they are everywhere, in deposits older than the Pleistocene or Quaternary Epoch is not proven.
Map of North America showing the area buried under ice during the Great Ice Age of the Quaternary period; the three great glacial centers; and the extent of mountain glaciers in the west.
Now, however, no important event of earth history is more firmly established, and no student of the subject ever questions the fact of the Quaternary Ice Age.
One is that the increased cold (not more than 10 to 15 degrees for the yearly average) was brought about by the notably increased altitudes of late Tertiary and early Quaternary times in northern North America and Europe.
Before leaving this part of our discussion we shall briefly present some evidence showing that the New York-New England-St. Lawrence region at least must have been considerably higher shortly before the Ice Age (Quaternary period).
Two continental ice sheets of special interest to the geologist are those which existed during the great Ice Age of the Quaternary period.
The Mediterranean race is held to have entered Europe in force during quaternary time, presumably after the quaternaryperiod was well advanced, most likely during the last genial, interglacial period.
The crop plants appear to have come in earlier than the domestic animals, being perhaps brought in by the peoples of the Mediterranean race at their first occupation of Europe in late quaternary time.
Indeed, it is doubtful, in the present state of the available evidence, whether such a type of man could have survived in Europe from or over any period of quaternary time prior to the last period of glaciation.
A quaternary deposit, usually consisting of a fine yellowish earth, on the banks of the Rhine and other large rivers.
A calcareous tufa, in part crystalline, occurring on a large scale as a shore deposit about the Quaternary lake basins of Nevada.
An extinct South American quaternary mammal, allied to the armadillos.
An extinct quaternary mammal, of great size, allied to the sloth.
An extinct Quaternary marsupial from Australia, about as large as the hippopotamus; -- so named because of its two large front teeth.
An extinct gigantic quaternary mammal, allied to the ant-eaters and sloths.
In the quaternary period the Scandinavian peninsula was a centre of a glacial movement which spread its disastrous influences over Western Russia, Northern Germany and Holland.
Thus the uneven, undulating surface of the Archaean rocks, on which almost the whole country is firmly set, is in general covered with quaternary deposits of gravel and clay.
But this standpoint has been found untenable, because it has later become evident that the fauna surrounding the earliest inhabitants of the Northern countries was ours and not a quaternary one.
Lastly, only in the Quaternary comes the genus Equus, or true horse.
During late Pliocene and early Quaternary times, as already said, the islands were still a part of the mainland, and the whole was occupied by the same species, viz.
A glance at a geological map of Germany will show that the greater part of Prussia and of German Poland is covered by Quaternary deposits.
Quaternary beds also cover the floor of the broad depression through which the Rhine meanders from Basel to Mainz, and occupy a large part of the plain of the Danube.
