|Location:||3.5km northwest of Olofsfors bruk. Follow 353/E4 from Norrfors to exit Levar/Olofsfors, through Olofsfors. Signposted.|
|Classification:||Tectonic cave Fissure cave|
|Dimension:||Tjuv-Antes grotta: L=30m, W=5m, H=3m.|
|Address:||Storrisbergets naturreservat, Nordmalings kommun, 91481 Nordmaling, Tel: +46-930-14000. E-mail:|
|As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.|
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|Last update:||$Date: 2015/08/30 21:58:15 $|
|1966||rediscovered in by Rabbe Sjöberg.|
|1975||nature reserve created.|
Storrisbergsgrottorna is a small nature reserve with an area of 20ha, on Storrisberget (Storris mountain, 131m asl), which contains several small caves.
The biggest and best known of the caves is Tjuv-Antes grotta. Tjuv-Antes (Thief Antes) is the local name of the thief Anders Andersson, who - according to local lore - hid in the cave during the 19th century.
Tjuv-Antes grotta and other caves in the reseve are sea caves, created by the erosion of Baltic Sea waves. About 9500 years ago the rocks were below sea level, pushed down by the weight of several kilometers of ice. When the glaciers melted rather fast, the weight vanished and the crust started to uplift. The fast movement caused tectonic forces in the rock which resulted in seismic activity and the formation of faults. Such faults are weaknesses in the rock, caused by tiny fissures. When the weak zones reached the surface of the sea, they were eroded rather fast by the waves, so the caves are located at the weak fault zones.
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