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.
The Cretaceous (/krÉ¨ËteÉªÊÉs/ , krÉ-TAY-shÉs), derived from the Latin creta (chalk), usually abbreviated K for its German translation Kreide (chalk), is a geologic period and system from 145 Â± 4 to 66 million years (Ma) ago.n the geologic timescale, the Cretaceous follows the Jurassic Period and is followed by the Paleogene Period of the Cenozoic Era. It is the last period of the Mesozoic Era, and, spanning 79 million years, the longest period of the Phanerozoic Eon.