摘要:

Limnic molluscs, includingAncylus fluviatilis, Limnaea peregraf.ovata, andGyraulussp., were found in shore deposits approximately 20 m below the maximum limit of theAncylustransgression on northern Öland (Königsson 1964 a). Three new localities on Gotland with limnic faunas in comparable positions are described. A pollen diagram shows that the deposits at two localities, Roes on southern Gotland and Lilla Mafrids on middle Gotland, occurred before the rational limit of theAlnuspollen curve. This limit is connected with the middle part of theAncylustransgression, the deposition thus having taken place in a regressive period during the transgression or, more likely, in the transition between theYoldiaand theAncylusperiods. In the deposits at Nyby on Öland and Tajnungs on northern GotlandAlnuspollen grains have been found. However, aHystrixcurve (marine organisms) in this limnic environment affords evidence of a secondary fossil deposition. The presence ofAlnusin the two analyses thus does not give definite evidence of its actual presence in the landscape at the time of the shore material deposition at Nyby and Tajnungs. Still the possibility of this deposition having taken place in the transitional period between theAncylusand theLitorinatransgressions (Mastoglojatime) remains.

ISSN:0016-786X    

DOI:10.1080/11035896709448361

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

Last winter Swedish newspapers reported an event of violent shaking of the ground accompanied by cracking sounds in cultivated areas on the Swedish west coast. Because of the proximity to the Hallandsås, a horst bounded by distinct fault lines, the event was at first considered to be a real earthquake. However, as the records from the seismologic stations of South Sweden show no registrations of seismic activity at that time, and as, furthermore, the thin fissures that appeared in the ground do not form a tectonic pattern, the seismic interpretation must be dismissed. The fissure pattern rather indicates the release of horizontal tensions in the ground surface. The study of meteorological data proves that the shaking and fissuring of the ground occurred after a heavy decrease of temperature. The event is therefore considered to be a frost phenomenon arisen from cracking of the ground due to rapid and intense cooling of the ground. In order to investigate the possibility of their being the same kind as the phenomenon here in question earlier earthquakes are examined. The phenomenon of the winter of 1966 is also discussed as being a recent illustration of the old frost phenomena that frequently occur in the area as fossil ice-wedge polygons.

ISSN:0016-786X    

DOI:10.1080/11035896709448362

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

-Three peat-bogs from the Norwegian west coast have been found to contain horizons with volcanic ash. The grain size distribution and the refractive index of the glass in the ashes have been examined. The horizons with volcanic ash have been dated with Carbon 14 and the results have been compared with Icelandic acid ash layers from Askja, Öraefa, and Hekla.

ISSN:0016-786X    

DOI:10.1080/11035896709448363

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

This paper presents two different devices adapted to sediment and turf samplers of Hiller type, in order to make it possible to bring home and store series of complete cores and work with them with less risk of contamination than with the conventional type. One of the devices consists of tubes inserted into a conventional sampler. The other device, shown in Figs. 1 and 2, is a new construction in which tubes of metal or Plexiglass are inserted from the bottom end of the sampler and extracted with a special wrench after filling.

ISSN:0016-786X    

DOI:10.1080/11035896709448364

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

In situ observations of the Sylen shoal, a submarine outcrop of Ordovician limestone in the Bothnian Sea, were achieved with the help of SCUBA-diving equipment. High dip values of the strata were recorded. During the severe winter of 1965/1966 exceptionally thick ice packs were piled up on the shoal causing the destruction, down to depths of 16–17 meters, of small scale topographic features that had been observed during dives made in 1963, 1964, and 1965. The surface configuration of the formation is to a great extent due to wave action and submarine weathering.

ISSN:0016-786X    

DOI:10.1080/11035896709448365

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

The Sundre Beds and at least the upper part of the Hamra Beds of the Silurian of Gotland are correlated with the Upper Whitcliffe Beds, Ludlow area, England by the identification of the lower part of theeosteinhornensisconodont zone.

ISSN:0016-786X    

DOI:10.1080/11035896709448366

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

A description of a new type of sediment sampler specially constructed for taking continuous sample series in organic sediments particularly in shallow lakes either from a boat or from the ice.

ISSN:0016-786X    

DOI:10.1080/11035896709448367

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

The Unna Järta sulphide occurrence is situated on the SE slope of the mountain Unna Järta near the Kebnekaise Massif and 80 km W of Kiruna. The occurrence consists of a sulphide-bearing quartz-vein about 1 m wide and at least 400 m long. The vein lies in a flexure, at the contact of allochthonous and autochthonous Caledonian rocks. The most common sulphide mineral is pyrrhotite but locally concentrations of sphalerite and silver-bearing galena are found.

ISSN:0016-786X    

DOI:10.1080/11035896709448368

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

G. IMBÒ & Catalogue of the active volcanoes of the world including solfatara fields. Part XVIII: Italy 52 pp., 21 Figs., 13 Tab. Roma 1965. Reviewed by Hans Pichler

ISSN:0016-786X    

DOI:10.1080/11035896709448369

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035896709448370

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor