A new study of ancient "desert pavement" in Israel's Negev Desert finds a vast region that's been sitting there exposed, pretty much as-is, for about 1.8 million years, according to Ari Matmon and colleagues at Hebrew University of Jerusalem.
It is the oldest known vast expanse of surface area. In fact it is more than four times older than the confirmed next oldest desert pavement, in Nevada, according to an article at the web site of the American Association for the Advancement of Science.
The newly dated desert pavement does not represent the oldest material on Earth, however. A lot of individual rocks have been found that are much older....