Answer:
The opal is the National Gemstone of Australia. The opal is almost exclusively located within Cretaceous sedimentary rocks of the Great Artesian Basin, Intense weathering resulted in extensive silicification at relatively shallow levels within the Tertiary regolith.
The slave trade played a major role in helping Europeans take control of much of Africa in the 1800s, since this allowed them to do business with local slave dealers and form alliances that kept them safe.
That doesn’t make any sense, Tax payers pay for education
From its earliest years, the Senate has jealously guarded its power to review and approve or reject presidential appointees to executive and judicial branch posts. In its history, the Senate has confirmed 126 Supreme Court nominations and well over 500 Cabinet nominations.
