Abstract
The time since fall of a meteorite is an important parameter in the study of infall rates, meteorite distributions, weathering of meteorites and meteorite concentration mechanisms. Stony meteorites can weather quickly in humid environments, but the large numbers of meteorites found in semi-arid and arid environments suggest much longer survival times. Meteorites can survive in deserts for at least 50 kyr. Similarly, the cold and dry conditions of polar regions such as Antarctica have proved to be great stores of meteorites. Meteorites in Antarctica show an older terrestrial age distribution than for wanner locations. A few types of meteorites have been found in Antarctica with ages of up to 2 Ma. In this paper, I discuss the terrestrial residence times or terrestrial ages of these meteorites. I will also discuss the wide range of terrestrial ages from different environments, which show the effects of local effects on the storage of meteorites.
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