Rabbe Sjöberg

Sweden has thousands of caves cut into the bedrock, two thirds of which occur in the crystalline bedrock, and hence represent pseudokarst phenomena. The formation of these caves can only be understood in terms of paleoseismics. In this paper, we review the parallel evolution of the concept of pseudokarst caves and of the concept of paleoseismic act...

Studies of paleoseismic sites have during the last years developed in Sweden as well as abroad. This paper summarizes the results of cave related studies in Sweden, Norway, Russia and Scotland. In Sweden we now have learnt a lot on the formation of caves formed by methane venting deformation and also learnt how to recognize these in field. In Norwa...

Grytgrottan at Bankekind. The cave is most probably formed by methane wentings during the period of deglaciationof the area. The obtained age of dated speleothems in Stalaktitgrottan, Grytgrotteområdet, S. Sweden is very similar to that obtained in the soda straw studied before (Grottan 1.2016). That means, that around 9480 - 9680 BP, there was a g...

SUMMARY Grytgrottan, in the county of Östergötland, S. Sweden, is a system of caves formed between boulders partly filled by glacial clay. The boulders are formed by a granitoid and syenitic bedrock. In one of the caves a large number of speleothems are found. Chemical analyses shows that these are formed by calcite, and thus are real stalactites,...

Gobholo cave in Swaziland is one of the longest granite caves in the world. This report tries to explain the origin of the cave and the adjacent river valley.

Goboholo Cave in Swaziland was researched by an international team in early 2024. Several archaeological artifacts were found in the cave. This preliminary paper tries to find out what is known of these types of atifacts.

ABSTRACT The Gobholo Cave in Swaziland – Expedition to one of the world's largest granite caves A small part of the Gobholo cave in western Swaziland (southern Africa) has been used for touristic adventure tours for a few years, but the cave has never been surveyed nor investigated scientifically. An international team of speleologists started expl...

Unpublished manuscript from 1992 with archeological implications of the Schmidt Test-hammer in NE Sweden.

Unpublished manuscript from 1992.

First manuscript for a once planned book om the use of Schmidt Test-hammer in archaeological and geomorphological implications. Reference list in supplementary resources.

Summary by N-A Mörner: The Eastern Klövberget Cave is located in the steep and 65 m high western bedrock side of the Tyresö Peninsula, east of Stockholm. The origin of the deformations has to be understood in terms of seismo-tectonics (Mörner, 2003, p. 240). This is illustrated in Fig. 2. As a consequence of a major postglacial earthquake (probably...

In the northern escarpment of the 280 m high mount Högklinten, Mjällom, NE Sweden, a qurious structure is investigated. The mountain is built up by red nordingrågranite. The structure is a plane in the granite dipping 24 degrees into the mountain. This plane is clearly visibel outside the cave. Here 11 caves are studied, the largest of which is a h...

Tjuv-Antes grotta (Tjuv-Ante’s Cave) located in northern Sweden is a round-abraded sea cave (‘tunnel cave’), about 30 m in length, formed by rock-water abrasion in a dolerite dyke in granite gneiss. Abundant speleothems are restricted to the inner, mafic parts of the cave and absent on granite parts. The speleothems are of two types: cylindrical (c...

Thèse (doctorat)--Stockholm University, 1994. Earlier it has been stated that seismotectonically formed features only occured in the northern parts of Sweden. The aim of this thesis has been to analyse the distribution and probable origin of a large number of fractured bedrock surfaces, fractured hills, boulder heaps as ”blown up” hills (several of...

It is well known that in any cave region, there are a large number of small caves and few large ones. The distributions of cave lengths often display hyperbolic, or power-law distributions with a negative exponent (Curl, 1986, Badino, 2001). A power-law distribution has no mean unless a lower boundary is defined, this is usually the lower limit for...

During the last couple of years a number of speleothems from pseudokarst caves in granitic bedrock in Sweden have been chemically investigated using EDS-analyses. The work have been done by prof. J.R. Vidal-Romani, University of la Coruna, Spain. The most common minerals in our speleothems are opal-A, calcite, and gipsum. The speleothems show a ric...

The results from the 2012 year's reconnaissance expedition to the first major cave reported from Swaziland, southern Africa, will be presented and discussed. The cave is formed by deep weathering and fluvial transport of weathering products in the 2.7 Ga old granites of the Mbabane Pluton, Kaapvaal Craton. So far only a small fraction of the cave h...

Tjuv-Antes grotta (Tjuv-Ante’s Cave) located in northern Sweden is a round-abraded sea cave (‘tunnel cave’), about 30 m in length, formed by rock-water abrasion in a dolerite dyke in granite gneiss. Abundant speleothems are restricted to the inner, mafic parts of the cave and absent on granite parts. The speleothems are of two types: cylindrical (c...

To a vast extent the bedrock on the Swedish mainland, as well as on the archipelagos on the western Swedish coast and in the Baltic and Bothnian sea areas, consists of crystalline magmatic and metamorphic rocks e.g. granites and gneisses. Other types of magmatic and metamorphic rocks exist as well. Only in the western Caledonian mountains and on th...

This investigation was initiated by the authors in an attempt to clarify some of the main problems related to compass roses - in Finland these are called stone compasses. These consist of natural stones the size of a football or smaller placed, usually, in the formation of a cross or a star, with four or eight arms radiating from the centre. Specia...

Materialet är författat av Rabbe Sjöberg, geolog, fil.dr. Utsikten från Högklintens topp är imponerande och på få ställen har man en sådan horisontenrunt utsikt över Höga Kustenområdet från Örnsköldsvik ned mot Härnösand, speciellt ej över områdets norra skärgårdsdel med den geologiskt varierande öbågen från Skagsudde ned förbi Ulvöarna. Denna skär...

Sammanfattande text Tre namnformer används för denna lokal: Rövarklippan, Rövarberget och Barstakulan. Barstakulan är det historiska namnet, som förekommer i flertalet sägner om grottan. För dagligt tal utmärker sig Rövarklippan mot Rövarberget då det senare förekommer i stort antal i övriga landet. Grottan mest känd för sina väl dokumenterade röva...

A dry rock deposition of the high-level nuclear waste is accessible and controllable. In such a repository, the waste canister can be repaired and the waste can be subjected to future methods of transmuting the waste to a more harmless stage or utilising the remaining energy more efficiently or even completely. This is not possible in a final, clos...

Summary. Lichenometry was investigated as a method for dating boulder ridges on the beach at Bådamalen near the tip of the Mjällom Peninsula in Northern Sweden. Cumulative growth rates of Rhizocarpon alpicola obtained from coastal churchyards at Nordingrå and Bureå (0.49 mm yr-1 and 0.57 mm yr- respectively) were found to be approximately twice the...

The Iggeesund event is an example of the high seismicity which occurred in Fennoscandia during deglaciation as a function of the high rate of glacial isostatic uplift. This event is dated to varve 9663 BP. The Iggesund–Hudiksvall area is represented by intensive postglacial fracturing of the bedrock recorded over an area of, at least, 50×50 km. The...

More than 50 boulder labyrinths (stone mazes) along the Swedish Bothnian coast have been dated using a lichenometric method. The lichen used for this study is Rhizocarpon geographicum, which is a comon species on isostatically raised boulder beaches in the Bothnian region. The lichenometric method is described. The results show that most the labyri...

ABSTRACT Thèse (doctorat)--Stockholm University, 1994. Earlier it has been stated that seismotectonically formed features only occured in the northern parts of Sweden. The aim of this thesis has been to analyse the distribution and probable origin of a large number of fractured bedrock surfaces, fractured hills, boulder heaps as ”blown up” hills (s...

Sand samples of quartz composition from two caves and a gorge in Bohuslan, Sweden, were studied by scanning electron microscopy to determine microtextural differences between subsamples of exfoliation flakes, neotectonically-released grains (high velocity impact), weathered granitic and glacially transported particles. While there are similarities...

Weathering in a number of abraded shore-caves along the N Swedish coast, from sea-level up to 180 m a.s.l., has been investigated using the Schmidt Test-hammer. The results show that weathering in the inner parts of the up to 30m long, horizontal caves is almost non-existent, independent of altitude. This means that the micro-climate, even inside s...

The Schmidt hammer has for some years been used to measure the hardness of different rock surfaces and to date relatively boulders in moraine deposits. In this paper applications on isostatically raised boulder‐beaches and rocky shores are described. The research area is the northern Swedish Bothnian coast where present isostatic uplift is between...

The Schmidt Test-hammer has for some years been used to measure the hardness of different rock-surfaces, and to date boulders in moraine deposits relative to each other. In this paper applications on isostatically raised boulder-beaches and rocky shores are described. The research area is the northern Swedish Bothnian coast where present isostatic...

Within speleology sciences such as geomorphology, hydrology, geochemistry and geophysics are complimented by the humanistic sciences if archaeology, ethnology and history. this paper deals with Swedish speleological research within geosciences from the beginning of the 20th century up until 1986. Several of the well-known Swedish geologists such as...

The Schmidt Test-hammer has for some years been used to measure the hardness of different rock-surfaces, and to date boulders in moraine deposits relative to each other. In this paper applications on isostatically raised boulder-beaches and rocky shores are described. The research area is the northern Swedish Bothnian coast where present isostatic...

A rock carving at Stora Backa, Bohuslän, sweden has been tested using the Schmidt Test Hammer. the results reveal that the original carving, (a sun cross)has later been complemented by a cross-shaped feature. This possibly happened during a period of celtic influence.

Weathering processes on isostatically raised boulder-beaches and rocky shores are described. The research area is the northern Swedish Bothnian coast where present isostatic uplift is between 0.8-1.0 cm/yr. Elevation above sea-level can be used to assign age to beach deposits. Rebound-values (R) of the Schmidt-hammer are correlated with the altitud...

During the last few yearsseveral caves along the N Atlantic coast of Norway have been studied. All these caves face the present sea, but are situated well abovethe highest post-glacial local shoreline. The caves are mostly of great size, odten more than 100 m long and around 40 m in high. Four of these are described. and a 1000 km long profile from...

During the last few year everal caves along the Northern Atlantic coast of Norway have been studied. All these caves face the present sea, but are situated well above the highest post-glacial local shoreline. Four of these caves are described, herein and 1000 km long profile from the Stadt-peninsula in More-Romsdal to Andoy in Vesteralen showing th...

Test results of measurements with the Schmidt Test-hammer in Zbrasovsky Aragonite Cave, Moravia, CSSR.

Analyzes of result of an inventory of caves in Archaean rocks in N. Sweden

Same as abstract 88A/0069. -K.Clayton

Although an area of non-karstic rocks, there are many small caves in this region. Some were formed by glacial processes, very many have been formed at the coast as the land has emerged glacio-isostatically from the Baltic Sea. Many different classes of cave are described and mapped. -K.Clayton

Several caves formed within gigantic boulders have been researched in Sweden. Many facts suggest a neotectonic origin for these bouldercaves, meaning that they were formed by earthquakes during the melting of the Weichsel-glaciation about 10.000 years B.P., when the isostatic uplift of the region could have reached 0.2–0.5 m per year. The author pr...

The type of cave studied in this paper is a cave formed in a crevice of tectonic origin in archean rocks. In particular this type of cave has a pear-shaped cross-section, the origin of which is discussed. Earlier studies during this century have shown that the caves are either of glacifluvial, or of marine abrasive origin. Caves of this type are ra...

A total of 31 cave sites are described as well as folk-lore connected to them. The research area is situated along the NE Swedish coast.The book is illustrated with photoes and cave maps.

The paper summatizes the studies carried out in the Swedish Alpine karst regions between about 1900 to 1980.

Two theories have been used to explain the origin of round eroded caves in Archaean rocks in Sweden. No evidences of glacial or glaciofluvial formation of the caves can be found. A model of development of cobble abrasion on present shores is presented and a formula has been derived for the length of time required to form the caves. -from Author