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 answer is B. I hope this helps you out a lot:)
Answer:
The answer is C, describe the past :)))
Explanation:
Answer:
Proclamation of 1763, proclamation declared by the British crown at the end of the French and Indian War in North America, mainly intended to conciliate the Native Americans by checking the encroachment of settlers on their lands.