Radiocarbon dating and methods of low level counting www newhampshire dating com
372,200,000 to 358,900 years ago Famennian age of the separated by about 10 million years.
About 375 million years ago, towards the end of a time interval called the Givetian.
The end-Frasnian extinction was most pronounced in tropical environments, particularly in the reefs of the shallow seas.
Reef building sponges called stromatoporoids and corals suffered losses and stromatoporoids finally disappeared in the third extinction near the end of the Devonian.
The about 365 million years ago during the Famennian.
4,540,000,000 (4.54 billion) years ago Formation of planet Earth - Usher's date was ).
Archeozoic: end of Azoic to 2,500,000,000 years ago: The era of the earliest living beings on earth.
It mentions the following periods to indicate how long ago coal was formed: Carboniferous followed by 359,200,000 - 326,400,000 years ago Dinantian series or epoch from the Lower Carboniferous system in Europe 326,400,000 to 313,400,000 years ago Namurian stage in the regional stratigraphy of northwest Europe are found - Silicious Grit, providing stone for building and millstones - Shale - then lime-stone and toadstone alternately.
The veins of metallic ores appeared in the limestone.