Cryptic (geology)
The Cryptic era is an informal term for the earliest geologic evolution of the Earth and Moon. It is the oldest (informal) era of the Hadean eon, and it is commonly accepted to have begun close to 4533 million (about 4.533 billion) years ago when the Earth and Moon formed. No samples exist to date the transition between the Cryptic era and the following Basin Groups era for the Moon (see also Pre-Nectarian), though sometimes it is stated that this era ended 4150 million years ago for one or both of these bodies. Neither this time period, nor any other Hadean subdivision, has been officially recognized by the International Commission on Stratigraphy.
Hauran
During the Hellenistic period beginning in the mid-4th century BCE, the Hauran was at first a possession of the Ptolemaic dynasty, which saw the region as a buffer zone separating their kingdom from Seleucid Damascus. Its sparse population consisted of semi-nomadic and nomadic groups such as the Itureans and Nabateans and the area remained largely undeveloped. The Seleucids conquered the Hauran following their victory over the Ptolemies in the Battle of Panium near Mount Hermon in 200 BCE. During the decline of the Seleucid Empire, the Petra-based Nabatean Kingdom emerged to the Hauran's south. The Arab Nabateans expanded their presence to the southern Hauran towns of Bosra and Salkhad. By the end of the 2nd century BCE, Seleucid control of the Hauran had become largely nominal and the region became a contested area between the Nabataean Kingdom, the Jerusalem-based Hasmonean dynasty and the Iturean principality based in the northern Golan and southern Mount Lebanon.