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Experimental weathering of selected non-calcareous rock types under wet/moist conditions
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences. (Naturgeografi)
2007 (English)In: Zeitschrift für Geomorphologie, ISSN 0372-8854, Vol. 51, no 1, 1-26 p.Article in journal (Refereed) Published
Abstract [en]

This experiment outlines chemical and physical weathering of selected non-calcareous rock types during the time between November 2002 and February/March 2004. Parallel series of rock specimens were placed in boxes and half covered by water. One set was exposed to different temperature amplitudes in a freeze room, i.e., a simulated periglacial environment, another set was placed outdoor in a temperature environment with a mean annual temperature of c. +6°C, and four samples were placed in an office with a temperature of 21°C ± 3°C throughout. Electric conductivity, ion composition and pH values of the water together with the resulting amount of debris were determined for all samples at the termination of the experiment. In addition the electric conductivity and the debris were noted at intervals during the experiment. All samples experienced chemical weathering and the Freeze room and the Outdoor samples also underwent physical weathering to various extent. Generally speaking the highest degree of physical weathering was found in the Freeze room samples, but the pattern was not consistent. The relative importance of chemical weathering on the other hand seems more related to rock type than to environmental conditions. In single cases there are hints to suggest quantitative dominance of chemical over physical weathering in the Freeze room series. A tentative relationship between weathering of the respective rock types and the landforms in the areas of their origin could be noted. In spite of the low sample number and simple investigation methods the results suggest that rates of chemical and physical weathering as well as their mutual importance is more complex than traditionally believed.

Place, publisher, year, edition, pages
2007. Vol. 51, no 1, 1-26 p.
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:uu:diva-95077DOI: 10.1127/0372-8854/2007/0051S-0001OAI: oai:DiVA.org:uu-95077DiVA: diva2:169148
Available from: 2006-11-02 Created: 2006-11-02 Last updated: 2010-05-07Bibliographically approved
In thesis
1. Development of a Detailed Geomorphological Mapping System and GIS Geodatabase in Sweden
Open this publication in new window or tab >>Development of a Detailed Geomorphological Mapping System and GIS Geodatabase in Sweden
2006 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis presents a method for detailed landscape presentation. The method incorporates both fieldwork-based comprehensive geomorphological description and digital data handling and thus contributes in filling the gap between traditional geomorphological mapping and modern geomorphological studies performed in Geographic Information Systems (GIS).

The main part of the thesis relates to development of a new detailed geomorphological mapping system, constructed to be easy to use and yet present a large amount of geomorphological information. The legend of the mapping system has successfully been applied to various types of landscapes, mapped at various scales between 1:5,000 and 1:50,000 without any modifications needed. The information presented in the map is based on simple descriptive criteria and thus the subjectivity is kept low, which enables a broad field of usage. In parallel with the mapping system a GIS-based geomorphological database has been developed. The structure and data presentation of the new mapping system allows for easy transformation of the data to form part of this database. The selected format of the GIS database is the ESRI ArcGIS®, Personal geodatabase.

In the development of the geomorphological mapping system four field areas have been mapped in central (Bonäs, Risa and Liden) and northern Sweden (Tarfala). In addition the new legend has been adapted to a field area situated in Vorarlberg, Austria (Upper Gamperdona valley).

In relation to the Tarfala field area an added issue of the project has been to give insights in the effects of physical and chemical weathering on various rock types to see if this can be detected in materials and landforms. The results from this study point at that resistance towards weathering vary among rocks even though they are of same rock type.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2006. 36 p.
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 236
Physical geography and sedimentology, Geomorphology, Geomorphological map, GIS, Sweden, Naturgeografi och sedimentologi
urn:nbn:se:uu:diva-7222 (URN)91-554-6705-9 (ISBN)
Public defence
2006-12-01, Hambergsalen, Institutionen för Geovetenskaper, Villavägen 16, Uppsala, 10:00
Available from: 2006-11-02 Created: 2006-11-02Bibliographically approved

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