This marked the end of the Quaternary extinction event, which was continued into the modern era by humans.
The time around 11,700 years ago (9700 BC) is widely considered to be the end of the old age (Pleistocene, Paleolithic, Stone age, Wisconsin Ice Age), and the beginning of the modern world as we know it.
First, Sedimentary rocks are formed when solid materials carried by wind and water accumulate in layers and then are compressed by overlying deposits.
Approximately 100.000 people still suffer from chronic disease consequential to gas exposure, today.
(Note that the numbers of victims are not absolute, as they are different for every organization that describes the accident in books or on their websites.
Chernobyl: Russian nuclear power plant explosion 3. This event is now known as the worst industrial environmental disaster to ever have occurred.
presents what it claims is evidence for vast time spans.
This is graphically illustrated in a chart on pages 36–37: man’s existence is in such a tiny segment at the end of a 5-billion-year time-line that it has to be diagrammatically magnified twice to show up.