Upper Geysir basin / Yellowstone national park

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The upper Geysir basin, also old Faithful region mentioned, is the region in the Yellowstone national park, which exhibits the highest concentration of geothermalen objects in the park. It is to the locality Norris because of the edge of the Yellowstone Caldera in the US Federal State Wyoming, south, and covers about 2.5 km country. Under the geothermalen objects a quarter is approximately all Geysire, under it the old Faithful, existing world-wide, Grand Geysir, Riverside Geysir, Castle Geysir and Daisy Geysir.

The hills, which surround the upper Geysir basin, are leftovers from sour lava from the

Glacier deposits of the last ice age created storage areas for water under the Geysir basin. Only owing to this memory is possible for Geysire.

Signs for a strong erosion are pervasive in the upper Geysir basin, from drainage canals, which are cut into the sinter, up to the drainage of the Firehole Rivers. South the old Faithful form mountains. There the Rocky Mountains reaches a height of 2518 m and divides the country into two water catchment areas.