ISSN:0016-786X    

DOI:10.1080/11035894709454068

出版商:Taylor & Francis Group    

年代:1947

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035894709454069

出版商:Taylor & Francis Group    

年代:1947

数据来源: Taylor

摘要:

A specimen of an unusually large single coral, Coelosmilia galeriformis Kner sp., probably the only one of this species ever met with in Sweden, has been collected in the Senonian Mucronata beds at Bjernum, N. Scania. A short review is given of the Senonian Hexacoralla in Sweden, and the new specimen is described and figured, and compared with C. excavata and C. ponderosa, which are also recorded from Sweden. As to the vertical distribution C. excavata ranges through the whole Mucronata series, while C. galeriformis seems to bo restricted to the Lower Maastrichtian, and C. ponderosa has been met with in the topmost Maastrichtian.

ISSN:0016-786X    

DOI:10.1080/11035894709454070

出版商:Taylor & Francis Group    

年代:1947

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035894709454071

出版商:Taylor & Francis Group    

年代:1947

数据来源: Taylor

摘要:

The fauna and correlations of the beds with Illaenus crassicauda (Wahl.) and Tallinnella dimorpha Öpik (lower Middle Ordovician), originally called »Flagkalk» by Törnquist (1883), are discussed. For these beds, that appear to be contemporaneous with the Uhaku stage of Estonia, the name Crassicauda stage is proposed.

ISSN:0016-786X    

DOI:10.1080/11035894709454072

出版商:Taylor & Francis Group    

年代:1947

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035894709454073

出版商:Taylor & Francis Group    

年代:1947

数据来源: Taylor

摘要:

It is not easy to draw sensible conclusions from a pollen diagram. A pollen diagram registers vegetation, nothing else; all conclusions ref. other problems must be inferred from the vegetational changes by botanical judgment. Because of different pollen production in different spp. the relative percentages are of different significance according to which spp. form the rest of the vegetation. Selective destruction of pollen grains and local over-representation can easily bo detected and compensated for. Longdistance transport is generally of little significance as a scource of error, except outside the forest area. Pollen-analytic zones must be so clearly defined that isolated spectra can be referred to the proper zone. Correlations between diagrams based upon small-scale variations of curves are not reliable. Statistic errors have not been taken sufficiently into consideration. Formulas are given for the preliminary calculation of statistic errors. The number of pollen grains counted for the different spectra should always bo stated.

ISSN:0016-786X    

DOI:10.1080/11035894709454074

出版商:Taylor & Francis Group    

年代:1947

数据来源: Taylor

摘要:

A discussion is given of our present knowledge of the vegetational and climatic development in Denmark during the late-glacial period. The stratigraphic, microfloristic, and pollenanalytic evidence of climatic changes in the late-glacial period is discussed at length, and it is pointed out that the methods of pollen analysis must be adapted to the particular conditions prevailing in late-glacial time. The remarkable and rich late-glacial mammalian fauna is referred to, and the »steppc element» of the fauna and flora is discussed.

ISSN:0016-786X    

DOI:10.1080/11035894709454075

出版商:Taylor & Francis Group    

年代:1947

数据来源: Taylor

摘要:

Two lectures. In the first one the autor gives a preliminary account of the ancient Quaternary uplifted and drowned shore marks in the periphery of the glaciated area of Fennoscandia, at the eastern end of Gulf of Finland, and in the surroundings of Lake Ladoga and Lake Onega. The record is based partly upon studies of Russian geologists, i. a. K. K. Markow, S. A. Jakovlew, and Zemljakow, partly upon observations made by E. Hyyppä and the author. The most interesting event in the changes of level may bo considered a great marine transgression during the early Goti-Glacial time. At that time the Baltic stood in a direct connection with the White See. In the author's opinion, there may be constructed a couple of synchronic Late-Glacial shore levels which can bo followed from Ingermanland to the Salpausselkä end moraines, and which are bent downwards, showing thus a marked hinge line.

ISSN:0016-786X    

DOI:10.1080/11035894709454076

出版商:Taylor & Francis Group    

年代:1947

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035894709454077

出版商:Taylor & Francis Group    

年代:1947

数据来源: Taylor