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
By the early 2nd century CE, the last vassal kings of the Hauran region, Agrippa II (r. 53–100 CE) of the Herodian Tetrarchy and Rabbel II (r. 70–106 CE) of the Nabatean Kingdom had died and Rome under Emperor Trajan (r. 98–117) no longer saw the need for local intermediaries. The deaths of the Herodian and Nabatean monarchs in relatively quick succession provided an opportunity for the Romans to absorb their domains. Thus by 106, the empire formally annexed the entire Hauran, incorporating its southern part in Arabia Province and its northern part in Syria Province. The provincial boundary apparently followed the boundary just north of the Adraa–Bosra–Salkhad line that had separated the Herodian and Nabatean kingdoms. This administrative division remained for much of the 2nd century. This period, under the Antonine emperors who ruled until 180 CE, saw consistent stability, development and prosperity.