"Its occurrence is like finding a tropical seed in Arctic ice – indicating either an unexpected local environment or ...

New testing now shows the rocks are 4.16 billion years old, formed during the Hadean eon, when Earth was just beginning to ...

Sedimentary rock is comprised of sediment, as the name suggests. Over time, tiny minerals, sand, rocks, and debris layer on ...

The original composition is mostly lithic, with sublitharenites, litharenites, subarkoses, and rarely quartzarenites (sensu Folk 1968; Fig. 3). Primary composition was slightly modified by diagenetic ...