the term Tertiary period one names informally the geological time period of the Neozoic era before beginning of the quart acre. The Tertiary period began 65 million years ago (end of the chalk time) and lasted up to the beginning of the climatic degradation before approximately 2,6Millions years, in whose consequence the ice age age brought a change of cold and interglacial periods in the quart acre. The climate on earth was substantially warmer in the Tertiary period than today. After the mass becoming extinct of the large Saurier and many other animal species at the endthe chalk time developed mainly in the Tertiary period the animal and plant world, as we know it today.
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terminology and nomenclature
the term Tertiary period come of to historical geology, the description of geologic history, and 1760 by Guovanni Arduino were thus introduced. It arranged due to its observations at geological layers into upper Italy into a primary(Basalts, granites, slates), secondary (fossil lime deposits) and tertiary (recent sediment deposits) epoch. Although Arduino originally used this three-division only for the marking of different Gesteinsformationen, the system was used soon also as temporal raster. 1828 took over Charles Lyell thatTerm Tertiary period into its own, clearly more precise system. It divided the Tertiary period on the basis the proportional portions of fossil shell bowl finds in the respective layers into Eozän, Miozän, older and recent Pliozän. There this method however only for the examined region thatAlps and the northItalian level was suitable, in the future to today numerous further stratigraphische categories were introduced (see below).
The Tertiary period became however in the year 2004 from the internationally valid and from the international commission for Stratigraphie given change Geological time scale (geo logic Time Scale 2004) painted together with the term quart acre. To the place of the Tertiary period and the quart acre the Paläogen stepped (in former times: Old Tertiary period) and the Neogen (in former times: Young Tertiary period) as periods of the Känozoikums (Neozoic era). The Neogen became up togeological present extends and covers now also the epochs of the quart acre.
In the year 2005 the quart acre was taken up as Unterzeitalter (Subära) of the Neozoic era (Känozoikum) with the new duration of 2.6 million years formally again to the geological time scale. The quart acrecovered now the entire ice age age into the today's time. For the remaining time periods of the Känozoikums before the beginning of the ice age now again in summary the term Tertiary period can be used. The term does not become again formal however into the geological one Time scale taken up.
earlier organization Tertiary period than period of the Neozoic era
- Paläogen with
- Neogen with
the Kontinentalverschiebung slowed down in the Tertiary period clearly. Gondwana broke apart finally. The Indian Subkontinent collided with the eurasischen plate . The already independent Antarktika movedto its current position. Toward end of the Tertiary period South America and North America were connected to the today's form. The volcanic activity of the period was high. The global climate cooled down in the process of the millions of years. The tropical-moderate conditions, like it still inPaläozen prevailed, changed themselves to the arctic climate with extensive Vergletscherung.
the Tertiary period covers Flora and fauna rough the time interval between the fall of the dinosaurs and the beginning of the recent ice age. At the beginning of the periodmammals replaced the reptiles as dominant factor class . Each epoch of the Tertiary period is characterized by characteristic development jumps under the mammals. The earliest erkennbarenn ancestors of humans, the Hominoiden Proconsul and Australopithecus developed. The modern forms of the birds, reptiles, Amphibians, fish and that eddy lots were developed partly at the beginning of the Tertiary period already or developed in its process. The vegetable evolution brought the first Bedecktsamer out. The sea animals against it were subject - apart from the mammals - to only small ones evolutionary changes.
- Ernst rehearses: Germany in the primeval times, C. Bertelsmann, Munich 1986