Paleo Reports

Standard report (Based on 30 foot sample intervals) all samples are examined from the top down as they were collected. Samples are described as small to large, good, fair or poor or non representative. Comments of mud additives and cements and other contaminations are also provided.

Lithology                                                                                                           All samples are examined and described. All significant lithology changes are noted and described. Subsequent samples may be described as, "similar to above with" and minor changes noted.

Faunal descriptions                                                                                All dominant fauna is listed at each significant faunal change and highlighted. PCI uses a minimum 100 species working dictionary. Common to abundant foram count are estimated for counts over 10. Counts over 10 are indicated with the numbers with the numbers  

  1 to 3 =       very rare                40 (40 to 100)    very common

  4 to 10 =     rare                     100 (100 to 300)   abundant

10 (10 to 20) frequent               300 (300 to 750)   very abundant, acme

20 (20 to 40) common               750 (750 to 2000) flood, acme

(Abundances and diversities are useful in paleoenvironmental determinations)

(Species abundances (acmes) and associations may be useful in local correlations)

Subsequent samples may be listed as "same general assemblage" with minor changes or  new species noted.  

Same general assemblage faunal descriptions are limited to no more than 7 samples.

Samples with few forams or mixed faunas may be listed as non diagnostic or non representative.

Rapid deposition, unfavorable environments, poor samples will affect the foram faunas.

Downhole fall-in or contamination and sparse faunas may produce non representative samples.

All index forams (biostratigraphic tops) will be highlighted.                          

All samples are examined and the paleoenvironment identified from non marine to abyssal.

Detailed report - Same as the standard report with faunal lists and abundances required every 4th sample.

High resolution report - Same as the standard report with fauna abundances required on all samples or every other sample or every 60 feet. The time required is variable depending on the content of the working dictionary. The definition of detailed paleo and high resolution paleo varies with the user. For example; PCI has established type specimens for over 800 calcareous benthic species in the upper Eocene along with over 60 arenaceous and 30 planktic species, many of which are not found in available published literature.