Lige på kanten Traditional Geocache

Her bevæger du dig lige på kanten af tunneldalen i Genner Bugt. Og man fornemmer nærmest den ro der ligger over dette urørte område.

Tunneldalen i Genner Bugt opstod i forbindelse med den sidste istid (Weichsel Istiden). Her skal man forestille sig, at der har været en stor gletcher eller islag (som visse stede har været kilometer tykt).

Den klassiske tunneldalsteori forklarer dalenes dannelse sådan:
"Store mængder smeltevand, der blev dannet på isens overflade, sank gennem revner og sprækker ned til isens bund. Her samledes smeltevandet til rivende strømme, som gennem tunneler løb ud af gletscherportene ved isens rand. Smeltevandet, som fyldte tunnelerne helt ud, blev drevet frem af trykket fra det højtstående vand i sprækkerne, og det var derfor i stand til at løbe opad. Det kunne erodere dybt i underlaget og transportere smeltevandsmateriale ud til isfronten. Når indlandsisen var smeltet bort, lå - efter denne teori - de tidligere tunnelløb tilbage som dybe dale i landskabet."
Efter G. Gruelund, 1937.

You are walking right on the edge of the tunnel valley in Genner Bay. And maybe you feel the silence above this untouched area.

The tunnel valley in Genner Bay occurred during the last ice age (Weichsel Ice Age). You need to imagine that there has been a great glacier or icecap (some places more than 1000 meters thick).

The classic tunnel valey theory are explaining the formation like this:
"Large quantities of meltet water, which was formed at the ice surface, sank through the cracks and fissures down to the ice bottom. Here it gathered to rapidly water flows through tunnels, and ran out of the gates by glacier ice edge. Meltet water that filled the tunnels completely, was driven by the pressure from the high water in the cracks and it was therefore able to run upwards. It could erode deeply into the ground and transport materials to the fronten of the Ice. When the ice cap later had melted away, - according to this theory - the former tunnels of meltet water stood back as deep valleys in the landscape."
G. Gruelund, 1937.