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Publications
Publications (29)
At Abu Hureyra (AH), Syria, the 12,800-year-old Younger Dryas boundary layer (YDB) contains peak abundances in meltglass, nanodiamonds, microspherules, and charcoal. AH meltglass comprises 1.6 wt.% of bulk sediment, and crossed polarizers indicate that the meltglass is isotropic. High YDB concentrations of iridium, platinum, nickel, and cobalt sugg...
The earliest evidence for cheese production in the Mediterranean is revealed by stable carbon isotope analyses of individual fatty acids in pottery residues from the Dalmatian coast of Croatia. Lipid residue data indicate the presence of milk in the earliest pottery, Impressed Ware, by 5700 cal. BCE (7700 BP). In contrast, by 5200 cal BCE (7200 BP)...
List of pottery samples and biomarker data.
EN = Early Neolithic; MN = Middle Neolithic. Note: Pokrovnik Trench D level 2 and 3 are from one chronological stratum; Pokrovnik Trench D levels 5, 6, 7, and 8 are all from one chronological stratum [16]. Radiocarbon dates were calibrated with OxCal 4.2 [72].
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Average composition of cattle, sheep, and goat milk and products based on data summarized in [76–79].
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AMS radiocarbon samples.
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Summary of molecular and isotopic criteria to distinguish among animal and plant fats associated with archaeological artifacts and soils [10,35,38,53,55,80–88].
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Significance
A cosmic impact event at ∼12,800 Cal B.P. formed the Younger Dryas boundary (YDB) layer, containing peak abundances in multiple, high-temperature, impact-related proxies, including spherules, melt glass, and nanodiamonds. Bayesian statistical analyses of 354 dates from 23 sedimentary sequences over four continents established a modeled...
Presented here are results from the non-destructive portable X-ray fluorescence (pXRF) analysis of ceramic artifacts in Italy, Malta, and Croatia, dating to the Neolithic, Chalcolithic, Bronze, and Iron Ages, with a focus on the advantages and limitations of this method of analysis in identifying local vs. non-local pottery, and their “history” of...
A major cosmic-impact event has been proposed at the onset of the Younger Dryas (YD) cooling episode at ≈12,800 ± 150 years before present, forming the YD Boundary (YDB) layer, distributed over >50 million km2 on four continents. In 24 dated stratigraphic sections in 10 countries of the Northern Hemisphere, the YDB layer contains a clearly defined...
The eastern Adriatic is a key area for understanding the mechanisms and effects of the spread of agriculture. This article presents an accelerator mass spectrometry (AMS) radiocarbon chronology for the introduction and subsequent development of farming villages on the eastern shore of the Adriatic (~6000–4700 cal BC) and evaluates this in compariso...
Significance
We present detailed geochemical and morphological analyses of nearly 700 spherules from 18 sites in support of a major cosmic impact at the onset of the Younger Dryas episode (12.8 ka). The impact distributed ∼10 million tonnes of melted spherules over 50 million square kilometers on four continents. Origins of the spherules by volcani...
It has been proposed that fragments of an asteroid or comet impacted Earth, deposited silica- and iron-rich microspherules and other proxies across several continents, and triggered the Younger Dryas cooling episode 12,900 years ago. Although many independent groups have confirmed the impact evidence, the hypothesis remains controversial because so...
As part of the Early Farming in Dalmatia Project, an interdisciplinary effort toward understanding the origins of European agriculture, we are performing a site-specific geoarchaeological study of the Middle Neolithic Danilo Bitinj site and the Early and Middle Neolithic Pokrovnik site. Here we present the soil description and analysis for Danilo B...
Hitherto, the earliest archaeological finds of domestic cereals in southwestern Asia have involved wheats and barleys dating from the beginning of the Holocene, 11-12000 calendar years ago. New evidence from the site of Abu Hureyra suggests that systematic cultivation of cereals in fact started well before the end of the Pleistocene-by at least 130...
We present new evidence suggesting that the Late Glacial worldwide episode of cooling known as the Younger Dryas (ca. 11,000-10,000 B.P.) had a significant impact on climate, vegetation, and human economy in southwest Asia. In the Levant a new pollen core extracted from Lake Huleh and plant remains from the early village of Abu Hureyra 1 indicate t...
Thesis (Ph. D.)--Oxford University, 1978. Includes bibliographical references (leaves 502-524). Photocopy.
Projects
Project (1)
Investigating the Neolithic in Dalmatia. Currently studying domestic animal management with an NSF-funded project