Pliocene palynomorph censusdata from the Pinecrest Beds (Tamiami Formation) in Quality Aggregates Phase 6 pit, Southwestern Florida

The USGS Open-File Report 92-712 data set (Pliocene palynomorph census data from the Pinecrest Beds (Tamiami Formation) in Quality Aggregates Phase 6 pit, Southwestern Florida) is a digital version of the original OFR 92-172 report. Data on arboreal and non-arboreal pollen concentrations are included. Core data and derived data sets and programs are made availbale online via the Wide Web: "pubs.usgs.gov/of/of93-563/" The following information about the data set contents were provided by the data center contact: Samples weighing about 80 grams were collected for pollen preparation.

Sediments first were screened through an 850 um mesh to remove shelly debris. Then, samples were decalcified using hydrochloric acid and demineralized using hydrofluoric acid. The neutralized residue was suspended in a dilute detergent solution to keep clay-sized particles in suspension and filtered through an 8 5m nylon mesh to remove the clay- sized particles.