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By Otto H. Walliser

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Additional info for Global bio-events: a critical approach : proceedings of the first international meeting of the IGCP Project 216, ''Global biological events in earth history''

Example text

As c o n t i n e n t a l The r e a s o n ( s ) concerning bottom terminal into after adaptive (about as far an to be c o m p r e h e n d e d question whereas and Ordovician (the F a m e n n i a n events. groups, before are c o n c e r n e d ) , tinction need many delay taxon in this in- t oto a mixture and subsequent community types for c o e v o l u t i o n . of 39 Conclusions In view terms, of the basic nature it is obvious following: suspected tained in order as possible. to get naturally, sample immediately will event be obtained it be possible localities 2) these horizon from of the c o m m u n i t y varied groups below samples community known immediately the q u e s t i o n after, horizon, of samples zonal data to exist d u r i n g the event the as many, should be ob- 3) these and only the and above groups where 4) after, in c o m m u n i t y requires representing as possible.

As f a m i l i a l One should, evolving taxa. recognizing, taxonomic with occurring within Changing defining, statistics. these m a t t e r s to i n t e r p r e t Practising ignore stratigraphic Smith. requi- and b i o g e o - not only as mere as i m p o r t a n t w h e n paleontologists as are have d e a l t We s h o u l d do our best information of b o t h e x t i n c t i o n s it if we w i s h These b r i e f c o m m e n t s level ways. the m a j o r When one in w a y s c o n d u c i v e and a d a p t i v e r a d i a t i o n s .

As c o n t i n e n t a l The r e a s o n ( s ) concerning bottom terminal into after adaptive (about as far an to be c o m p r e h e n d e d question whereas and Ordovician (the F a m e n n i a n events. groups, before are c o n c e r n e d ) , tinction need many delay taxon in this in- t oto a mixture and subsequent community types for c o e v o l u t i o n . of 39 Conclusions In view terms, of the basic nature it is obvious following: suspected tained in order as possible. to get naturally, sample immediately will event be obtained it be possible localities 2) these horizon from of the c o m m u n i t y varied groups below samples community known immediately the q u e s t i o n after, horizon, of samples zonal data to exist d u r i n g the event the as many, should be ob- 3) these and only the and above groups where 4) after, in c o m m u n i t y requires representing as possible.

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