Elizabeth K. Ralph

University of Pennsylvania Radiocarbon Dates VIII

This date list includes those series of archaeologic samples completed in this laboratory during 1963 and 1964. The B.P. ages are calculated from A.D. 1950, and are based upon a half-life value of 5568 yr. Errors quoted do not include the half-life error. All samples have been pretreated with 3N HCI, and some, where noted, have received an additional 2% NaOH pretreatment for the removal of possible humic acid contaminants. Standard calibration samples are 110- to 125-yr old oak samples which, when corrected for age, have CU contents equal to 95% of the NBS oxalic acid standard. The C13 relationship between the oak standard and NBS limestone standard #20 is -25.7 ± 1.3 mils as measured on the University of Pennsylvania mass spectrograph. We should like to thank John Gruninger and Dana Lissy for their excellent work in the preparation and counting of these samples.

University of Pennsylvania radiocarbon dates IX.

Radiocarbon dates completed as of November 1965 are listed for archeologic samples from shipwrecks in the Mediterranean Sea, and from Iran, Turkey, Nova Scotia, Newfoundland, Labrador, Quebec, Northwest Territories,, Alaska, Kodiak Island, Peru, Venezuela, British Honduras, and Guatemala.

University of Pennsylvania dates VII.

Carbon-14 dating was carried out on samples of Sequoia wood from Sequoia National Park and Balch Park, California, and of the Bristlecone Pine series from the White Mountains, California-Nevada.

C-14 Dates for Sites in the Mediterranean Area

The C-14 laboratory at the University of Pennsylvania was initiated by Froelich Rainey in 1951, and is sponsored jointly by the University Museum and the Department of Physics. From the start, dating efforts have been devoted to the determination of series of C-I4 dates for five regions of the world-namely, the Mediterranean, Near East, Central America, South America, and the Arctic. Results which are of special interest to prehistorians and historians of the Mediterranean area are brought together in the accompanying lists. This Mediterranean dating program was made possible by G. Roger Edwards who obtained samples from the excavators.

Archaeological surveying utilizing a high-sensitivity difference magnetometer

Abstract Two pairs of alkali vapor magnetometers, one cesium, the other rubidium, have been employed in a difference mode together with a digital readout unit, for a detailed magnetic survey of an archaeological site in southern Italy. Fine grid intervals together with a system sensitivity approaching 0.05 y have enabled quantitative interpretation of small anomalies subsequently verified by drilling. High speed of operation, cancellation of time-varying fields, and direct digital readout allow generation of magnetic contour maps in the field. These features are well suited to the peculiar problems of archaeological magnetometry, and indeed to other geophysical applications.