For correlation, useful fossils are those that
are abundant, widespread, rapidly evolving (and therefore of short range), and
distributed in a variety of facies. For example, ‘Trilobites’ are main tool of
correlation in Cambrian and Lower Ordovician; ‘Ammonites’ for Mesozoic; ‘Graptolites’
for Ordovician to lower Devonian; ‘Ammonoids’ are important in Devonian through
Permian; ‘Conodonts’ used from Ordovician through Triassic; ‘Foraminiferans’
are used for correlating the rocks of Upper Paleozoic and post Jurassic time.
Thursday, 28 November 2013
Saturday, 16 November 2013
Krista nun mawi- "Thu awih"
“….Nun ze mawi, Lal Krista nun mawi tak kha, nitin min zirtir ang che”
tia Dr. Ramdinthara Sailo-in Thlarau Thianghlim a sawmna hla hian min hneh hle ṭhin.
Krista nun mawi han tih hian chi hrang engemaw zah a awm thei ang. Tun ṭumah
hian Krista nun ze mawi zinga mi ‘Thuawihna’ chungchang hi han thlur bing ila.
Thu awih han tih hian tuemaw tirtu a awm avang emaw, dan zam sa avang
emaw, chanvo nei tura ruat vang emaw-tea chu thupek emaw, dan emaw,
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