On the use of some phosphates in the preparation of ostracod shells

Kontrovitz, Mervin; Slack, Jerry Marie; Zhao, Yanan

doi:10.1144/jm.10.2.121

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…Reference has also been found to the use of dilute solutions of sodium oxalate (Na^C^OJ, lithium chloride (LiCl), lithium hydroxide (LiOH), sodium tripolyphosphate (NajPOjOj^) and sodium hexametaphosphate (NafPOj)^) (Gray 1965). This last solution has been shown (Kontrovitz et at. 1991) to cause partial dissolution of ostracod valves, even at relatively low concentrations (2.5%), and when prolonged contact is maintained (6 hours-i-).…”

Section: Specimen Cleaning Proceduresmentioning

confidence: 55%

Pitfalls, problems and procedures in micropalaeontological preparation and conservation

Green¹

1995

Geol Cur

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Some micropalaeontological (palynology and calcareous, phosphatic, siliceous micropalaeontology) problems encountered by preparators, conservators and curators are illustrated using examples of recent preparations, historical collections, and observations from the literature. Better understanding of the mechanics and chemistry of stages employed in processing and preservation methods will reduce or eliminate many of these problems. The dissemination of knowledge gained during all preparation and processing stages is essential for specimen longevity, and avoidance of erroneous results during analytical work.

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Section: Specimen Cleaning Proceduresmentioning

confidence: 55%

Pitfalls, problems and procedures in micropalaeontological preparation and conservation

Green¹

1995

Geol Cur

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“…ULM tap-water has been shown to be harmless to the calcite shells. No phosphates or other chemicals were used to disperse or otherwise deflocculate the material because such reagents may damage calcium carbonate shells (Kontrovitz et al 1991). The sediment from each sample was then air dried and sieved with the following US Standard meshes: 20, 40, 60, 80, and 120.…”

Section: Methodsmentioning

confidence: 99%

Archaeological Data Recovery at Fish Creek Slough Site (41DL436)

Nickels¹

2015

ITA

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The Fish Creek Slough site (41DL436) is a well stratified, multi-component, open campsite situated on an alluvial terrace on the west bank of Fish Creek in Dallas County, Texas. Discovered in 2005, the site contains an abundance of faunal material, charcoal, and burned clay within multiple, discrete stratified zones. The site was evaluated by the Texas Department of Transportation (TxDOT ) as eligible for listing in the National Register of Historic Places. Because the site was within the right-of-way for a planned road and bridge construction project, and as directed by the National Historic Preservation Act of 1966, TxDOT elected to undertake archaeological data recovery excavations to mitigate adverse effects to the site.In October of 2010, AmaTerra Environmental, Inc. conducted archaeological data recovery excavations at the site under TxDOT contract no. 579-09-SA006. Mechanical stripping was conducted within a 6 x 20-m trench in 3-5-cm cuts down to 200 centimeters below the modern ground surface and exposed 43 burned zones, other features, and artifact concentrations. In addition to 285 cubic meters of soil removed mechanically, an additional 17.75 cubic meters was excavated within 107 hand-dug units. Collected and analyzed items included more than 8,700 faunal specimens, 43 pieces of chipped stone, and 206 fire-cracked rocks. Samples were collected for macrobotanical, magnetic susceptibility, pH, carbon, and malacology, pollen, diatom, phytolith, and ostracod assays and selected specimens of fire-cracked rock were analyzed for the presence of starches and lipids.Thirty-nine radiocarbon dates accepted as valid helped define four discrete occupational components with the earliest occupation probably occurring as early as AD 1025, and the last occupation probably as late as AD 1865. Geoarchaeological analyses show that the stratigraphic sequence accumulated rapidly, separating and preserving the discrete occupations in good context. Analysis of the exceptionally robust and well-preserved faunal assemblage provides evidence for interpretation of change through time in social structure, site spatial occupations, and diet and subsistence. Of special note, within the occupation zones dating to the Protohistoric and Historic periods, metal cut marks on bone suggest an increased reliance on European-introduced technology.

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Disaggregation and Dispersal of Partially Consolidated and Unconsolidated Sediments

Green

2001

A Manual of Practical Laboratory and Field Techniques in Palaeobiology

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On the use of some phosphates in the preparation of ostracod shells

Cited by 6 publications

References 3 publications

Pitfalls, problems and procedures in micropalaeontological preparation and conservation

Pitfalls, problems and procedures in micropalaeontological preparation and conservation

Archaeological Data Recovery at Fish Creek Slough Site (41DL436)

Disaggregation and Dispersal of Partially Consolidated and Unconsolidated Sediments

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