Sökning: "Siljan"
Visar resultat 1 - 5 av 15 avhandlingar innehållade ordet Siljan.
1. Terrestrial consequences of hypervelocity impact – shock metamorphism, shock barometry, and newly discovered impact structures
Sammanfattning : Impact cratering was once considered a rare geological process of no, or little, importance to the evolution of the Solar System and planet Earth. After more than 50 years of space exploration and the discovery of numerous (~190 as of October 2016) impact structures on Earth, this view has changed, and it is now clear that impact craters are in fact one of the most common morphological features on solid bodies in the Solar System. LÄS MER
2. Magnetotelluric study of the Siljan impact region : techniques and results
Sammanfattning : .... LÄS MER
3. Geophysical studies in the western part of the Siljan Ring Impact Crater
Sammanfattning : This thesis utilizes several geophysical methods to study the Siljan Ring impact structure, focusing on the western part of the structure. This thesis, and the three papers upon which it is based, reports on attempts to delineate the Paleozoic rocks at depth within the annular ring graben and characterize their structure. LÄS MER
4. Geochronology of impact structures - constraining syn- and post-impact processes using the 40Ar/39Ar and U-Pb techniques
Sammanfattning : The discovery, at the beginning of the 20th century, that elements can transform into other elements, due to the spontaneous decay of an instable to a stable atomic nuclei, gave rise to a powerful source for age information in many fields of earth science. For impact structures, it is crucial to establish well-defined and precise ages in order to understand how impact events affect the Earth’s geo and biosphere and also with regard to possible future events that can have devastating effects on our civilization. LÄS MER
5. Seismic attenuation, shear wave anisotropy and some aspect of fracturing in the crystalline rock of the Siljan Ring area, central Sweden
Sammanfattning : .... LÄS MER
