A tanged point and two blade technologies from Rubha Port an t-Seilich, Isle of Islay, western Scotland

2019-08-13T00:21:34+01:00

We describe a tanged point and a blade technology from Rubha Port an t-Seilich, Isle of Islay, Scotland that provides further support to a Late Pleistocene or Early Holocene presence in Scotland prior to the establishment of the narrow blade Mesolithic industry. The existing evidence for a Late Pleistocene or early Holocene presence comes from isolated finds of tanged points (Tiree, Shieldig, Brodgar), undated assemblages from disturbed contexts that are most likely Late Pleistocene in date (Howburn, Kilmefort Cave), and undated assemblages containing broad blade microliths (e.g., Glenbatrick, Morton). This article provides a summary of recent excavations and the stratigraphy at Rubha Port an t-Seilich, and a detailed analysis the lithic blade blank production at the site, which is, we believe, the first application of a chaîne opératoire based approach to a Scottish assemblage. The study includes comparisons with contemporary assemblages from north-western Europe. The significance of the Rubha Port an t-Seilich finds is threefold: (1) the relative large size of the assemblage that allows a technological analysis; (2) the finds partially derive from a stratified context below a narrow blade assemblage, associated with radiocarbon dates 9301-7750 cal. BP; and (3) further excavation can increase the sample size and potentially expose an in situ Late Pleistocene or early Holocene cultural horizon.

Preliminary archaeometric investigation on Middle Neolithic siliceous tools from Limba-Oarda de Jos (Transylvania, Romania)

2019-08-13T00:21:37+01:00

The present archaeometric study focuses on a set of archaeological siliceous lithic tools that are assigned to the early Vinča culture period (Vinča A and Vinča B1). They were found in several pit-houses at Limba-Oarda de Jos (SW Transylvania, Romania), an open settlement that has been dated to 5,405-5,310 cal. BCE, a period in the Middle Neolithic. A total of 322 retouched tools and débitage pieces were typologically and macroscopically investigated. From these, 20 pieces were analyzed by polarized light optical microscopy (OM) and 10 pieces were analyzed by Fourier-transform infrared spectroscopy (FTIR) in order to identify compositional characteristics, define the petrographic type, and establish the spectral fingerprint of each material.

Four petrographic types were discriminated: radiolarite, chert, fossiliferous chert, and siliceous limestone. Mineralogically, the tools primarily consist of a mass of microquartz and fibrous microquartz (called also ‘chalcedony’) associated with radiolarians remnants (in radiolarites); fossil shell fragments (in the fossiliferous chert); and limestone components, such as ooliths and pellets (in the siliceous limestone). All samples show distinct FTIR bands, most of which are assigned to microquartz, quartz, and fibrous microquartz. The deconvolution of the FTIR spectra in the 950-1300 cm^-1 domain reveals the contribution of several other phases, such as calcite and clay minerals.

The results support the assumption that the tools made of chert, fossiliferous chert, and siliceous limestone were produced at the site from nodules that probably originated from the Upper Jurassic chert-bearing limestone that crops out nearby in the Trascău Mts. The tools made of radiolarite were most likely brought to the site as finished products from the Trascău Mts.

Journal of Lithic Studies

A tanged point and two blade technologies from Rubha Port an t-Seilich, Isle of Islay, western Scotland

Preliminary archaeometric investigation on Middle Neolithic siliceous tools from Limba-Oarda de Jos (Transylvania, Romania)