Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-23T00:34:57.087Z Has data issue: false hasContentIssue false
  • English
  • Français

Geochronology

Published online by Cambridge University Press:  26 May 2015

Gerard De Geer
Get access Rights & Permissions [Opens in a new window]

Extract

In the American journal Science for 1920 mention was made of my plan for investigating certain laminated clays in North America. During a previous visit to that country in 1891 I had noticed, in several places, laminated clays, similar to late glacial melting sediments in Sweden ; these I had found, by long continued investigations, to represent the annual deposit from the melting water along the border of the retreating ice-edge. (Plate I). With the aid of a graphic method for the comparison of the sharply marked annual layers or varves, I had succeeded in identifying such varves from one point to another, and ultimately worked out a systematic plan for the elaboration of a continuous time-scale. (See page 309). This was mainly carried out in 1905-6 on the basis of field measurements made with the assistance of a number of able young geologists. During the following year this standard scale was completed at many points. I thus succeeded in tracing, step by step, the recession of the ice-edge and the immediately following progress of the clay varves over one region after the other, until the whole line from the south to the centre of Sweden had been traced.

Type
Research Article
Information
Antiquity , Volume 2 , Issue 7 , September 1928 , pp. 308 - 318
Copyright
Copyright © Antiquity Publications Ltd 1928

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

BIBLIOGRAPHY

1888—90. GEER, GERARD DE—Om Skandinaviens nivåförändringar under qvartärperioden. [On the Quaternary changes of level in Scandinavia]. Geol. Fören. Förhandl. 10 (1888), 366–79, pl. 2, and ibid, xii (1890), 61-110. [In Swedish].CrossRefGoogle Scholar
1908. GEER, GERARD DE On late Quaternary time and climate. Geol. Foren. Förhandl. 30 (1908), 459–64.Google Scholar
1910. GEER, GERARD DE A thermographical record of the late Quaternary climate. Die Veränderungen des Klimas seit dem Maximum der letzten Eiszeit. (Stockholm, 11 Geol. Congr., 1910). Pp. 303–10.Google Scholar
1912. GEER, GERARD DE A Geochronology of the last 12,000 years. Compte rendu de la 11 : e sess. du Congrès géol. intern. (Stockholm, 1910), fase. I. 1912, pp. 241–57, pls 1-2.Google Scholar
1921. GEER, GERARD DE Correlation of Late Glacial clay varves in North America with the Swedish Time Scale. Geol. Fören. Förhandl. 43 (1921), 70–73.Google Scholar
1922. ERNST, ANTEVS—The recession of the last ice sheet in New England. Amer. Geogr. Soc., research ser. no. II, 1922.Google Scholar
1925. ERNST, ANTEVS Retreat of the last ice-sheet in Eastern Canada. Can. Geol. Survey, mem. 146, Ottawa, 1925.Google Scholar
1925. DE GEER, GERARD. Förhistoriska tidsbestämningar. [Prehistorical Datings] Ymer, 1925, pp. I–3—Data, I. [In Swedish].Google Scholar
1925. NORIN, ERIK.—Preliminary notes on the Late Quaternary Glaciation of the North-Western Himalaya. Geogr. Ann. 1925, pp. 165–94, pls 4, 5.—Data, 2.Google Scholar
1926. DE GEER, GERARD. Om New York-Moränens verkliga ålder och betydelse. Geol. Fören. Förhandl. xlviii (1926), pp. 143–48.—Data, 7. [In Swedish].Google Scholar
1926. DE GEER, GERARD. On the Solar Curve as dating the Ice Age, the New York Moraine and Niagara Falls through the Swedish Time scale. Geogr. Ann. 1926, pp. 253–84, pls I–3.—Data, 9.Google Scholar
1927. DE GEER, GERARD. Late Glacial Clay Varves in Argentina, measured by Dr Carl Caldenius, dated and connected with the Swedish Time scale. Geogr. Ann. 1927, pp. 1–8, pl I .—Data, 10.Google Scholar
1927. NORIN, ERIK.—Late Glacial Clay Varves in Himalaya connected with the Swedish Time scale. Geogr. Ann. 1927, pp. 157–61, pl 2.—Data, 11.Google Scholar
1928. DE GEER, EBBA HULT.—Late Glacial Clay Varves in Iceland measured by Wadell, H., dated and connected with the Swedish Time scale. Geogr. Ann. 1928, pp. 205–14, pl. 4–5.—Data, 12.Google Scholar