Graptolitførende skifere i vestre Gausdal.
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Forkortet:The Vestre Gausdal is situated in the central part of Southern Norway, 145 kmnorth of Oslo. It lies on the border-zone between the sparagmite-formation,which is Cambrian, and the overlying Silurian schists, which are widelyextended over the higher parts of Southern Norway. The sparagmite-formationconsists in the region under consideration of gray arcose and argillaceousschists. The small river Vigga will be found in the north-western part of thesketch-map p.1. A section along the river is given on p.8. Undermost we see aconglomerate (Kgl.) belonging to the sparagmite. Over it follows grey oftenarenaceous limestone (kalk); black in the map.Over this lie different varietiesof quartzite interstratified with argillaceous schists. Now follow argillaceousschists at least 150 m thich, in the upper part containing the graptolitesfigured p.3. They belong to the Arenig group, etage 4 a of Brøgger. Uppermostwe have alternating strata of grayish clay-schist and arenaceous schists (St.).