PROCEDURE IN PALEONTOLOGICAL EXAMINATION OF SUBSURFACE SECTIONSDepositional environments of subsurface geologic sections of interest are interpreted primarily from occurrence of species and assemblages of foraminifera. Criteria for interpretation begin with studies of Recent foraminifera obtained from plankton tows and bottom samples collected from sea floor traverses and supplemented by similar studies in the other areas. This...
Wednesday, May 14, 2008
ECOLOGY OF RECENT ORAMINIFERA
ECOLOGY OF RECENT ORAMINIFERAThe distribution of foraminiferal taxa is influenced by many different factors. Although many authors consider water depth the most significant one, water depth specifically is not the main variable, the controlling factor being the various physical and chemical conditions associated with depth. Typical factors are temperature and temperature variability, light availability, sedimentation rate, bottom...
APPLICATION TO ANCIENT ENVIRONMENTS
APPLICATION TO ANCIENT ENVIRONMENTSThe study of paleoenvironments is based on the concept of uniformitarianism i.e. “The present is the key to the past”.Care must be taken. Within young Tertiary rocks there is very close correspondence between fossil and recent foraminiferal assemblages. But in older sediments, of Early Tertiary to Mesozoic age, gross differences may occur as in these periods certain groups of foraminifera common...
benthic marine environment
The benthic marine environment compiled from Hedgpeth (1957) and INGLE (1980) :Non-marine (supralittoral) – top delta, alluvial plain etc.Lorenz (1863) proposed supra-littoral for the term above extreme high water (Hedgepeth, 1957). This zone include top delta, alluvial plain etc.Transitional zone (littoral) - brackish water, bay, marsh, lagoon, estuaries, deltas, beaches, tidal flats.The term littoral has been used to mean the...
Tuesday, May 13, 2008
GONDWANAN PALYNOMORPHS FROM THE PALEOGENE SEDIMENTSOF EAST JAVA: ?THE EVIDENCE OF EARLIER ARRIVALBY EKO BUDI LELONO*)*) R&D Center for Oil and Gas Technology “LEMIGAS”, JakartaABSTRACTThe palynological investigation of the Paleogene sediments is based on cutting samples collected from the exploration wells which are drilled in East Java area. The occurrence of pollen Meyeripollis naharkotensis and spore Cicatricosisporites...
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