Cords decap American MP!
Tragedy for John Kennedy...
Person's name?
Paleo MP, pighead!
Ages ago I was trying to devise a user-friendly mnemonic for the phenerozoic [visible life] geologic timescale, which unceremoniously ended up, though, not unlike a petty joke. The lines, however, survived my college-induced (read: hyper-mnemonic) amnesia (a-mnesia, please). Fine, so it struck...
The first line codes periods from the paleozoic [ancient life]:
Lower paleozoic - Cambrian, Ordovician, Siluvian
Upper paleozoic - Devonian, Carboniferous, Permian
Whereas, American geologists traditionally divide the Carboniferous into the lower Mississippian and upper Pennsylvanian stages.
The second line codes periods from the mezozoic [middle life]:
Triassic, Jurassic, Cretaceous ('K' because it originated from kreta [German for chalk])
The third line denotes the idea that the traditional Tertiary period of the cenozoic [new life] is replaced by Paleogene and Neogene (the next period being Quatenary, no joke and no more).
The fourth line codes epoches from the cenozoic:
Paleogene - Paleocene, Eocene
Neogene - Miocene, Pliocene
Quaternary - Pleistocene, Holocene
Hope these jots help! (well, a stolen line from Peter Wolfe, paleobotanist, in his generous e-mail correspondence)
© Leo W Sham, MMVIII
Tragedy for John Kennedy...
Person's name?
Paleo MP, pighead!
Ages ago I was trying to devise a user-friendly mnemonic for the phenerozoic [visible life] geologic timescale, which unceremoniously ended up, though, not unlike a petty joke. The lines, however, survived my college-induced (read: hyper-mnemonic) amnesia (a-mnesia, please). Fine, so it struck...
The first line codes periods from the paleozoic [ancient life]:
Lower paleozoic - Cambrian, Ordovician, Siluvian
Upper paleozoic - Devonian, Carboniferous, Permian
Whereas, American geologists traditionally divide the Carboniferous into the lower Mississippian and upper Pennsylvanian stages.
The second line codes periods from the mezozoic [middle life]:
Triassic, Jurassic, Cretaceous ('K' because it originated from kreta [German for chalk])
The third line denotes the idea that the traditional Tertiary period of the cenozoic [new life] is replaced by Paleogene and Neogene (the next period being Quatenary, no joke and no more).
The fourth line codes epoches from the cenozoic:
Paleogene - Paleocene, Eocene
Neogene - Miocene, Pliocene
Quaternary - Pleistocene, Holocene
Hope these jots help! (well, a stolen line from Peter Wolfe, paleobotanist, in his generous e-mail correspondence)
© Leo W Sham, MMVIII
No comments:
Post a Comment