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.
You should NEVER pick up a gerbil by it's tail. The only animals with strong enough skin on their tails are mice. Even rats should not be picked up by their tails. The tails of gerbils are really delicate and can be injured easily, especially if you have the incorrect type of wheel. You should move your gerbil habitat to a place where your sister cannot reach it or lock your room.