The most common type of structural trap is formed by an anticline, a structure with a concave (as viewed from below) roof caused by the local deformation of the reservoir rock and the impermeable cap rock. In this case, the intersection of the oil-water contact with the cap rock determines the edges of the reservoir.
Wild Gerbils. Gerbils are small rodents but they are not rats! They normally have white bellies and are agouti coloured. They live in the wild in Central Asia, India, the Middle East, and Africa. They roam the savanna, steppe, hot desert and semi-desert areas of these nations.
A suitable environment for gerbils. Ensure your gerbils have a suitable place to live. A comfortable, dry, draught-free, clean place to live, in a quiet place where they can rest undisturbed. Make sure they are not exposed to draughty or damp conditions but also do not keep them in direct sunlight or next to a radiator. An ideal temperature range is 20-24Â°C. A gerbilarium large enough to provide shelter, opportunities to dig and space to exercise, with adequate bedding and nesting material. Wild gerbils live in dry climates, in large, deep burrows that they dig themselves to protect them from extremes of weather and from predators. Gerbils have fur on the soles of their feet and so do not climb well.