Yellow gemstones meaning is enlightening, wisdom, Cheeriness, joy, action, optimism, happiness, idealism, summer, hope, imagination, sunshine, philosophy, youth. The color yellow also symbolizes the sun. For those born in the month of November, Yellow is the color of their birthstones as yellow Topaz and Citrine.
The Cretaceous Period (146-65 million years ago). In the early Cretaceous, many of the southern continents were still joined together as part of the southern landmass called Gondwana.Northern continents formed the great landmass Laurasia. Australia was joined to Antarctica, New Zealand and South America, forming the last remnant of the great southern landmass called Gondwana. 2  About 80 million years ago New Zealand drifted away from the rest of Gondwana. 3  The Australian part of Gondwana was located close to the South Pole.
What was the shape and location of the continents during the Precambrian Era? Back in ï»¿ the Precambrian Era there weren't any fully developed continents. What were some major changes to landforms during the Precambrian? ï»¿ Some major changes to landforms were that the Earth formed 4.6 billion years ago, the first sedimentary rock formed about 4 billion years ago, and oceans formed about 4 billion years ago What were some major changes to living things during the Precambrian Era?