M Alessio

University of Rome carbon-14 dates X.

Peat, wood, charcoal, Italy, Sicily; for reference to part 9, see this Bibliography Vol. 35, No. 10, 06 E71-30293.

Radiocarbon dating of active faulting in the Agri high valley, southern Italy

Abstract The high valley of the Agri River is a wide intermontane basin located in the Lucanian Apennine, southern Italy. This basin was formed during Quaternary times in the hinterland of the Neogene fold-and-thrust belt. Tectonics has strongly controlled shape, morphology and sedimentary evolution of the basin up to the present. The Agri Valley, in fact, has been hit by recurrent and large earthquakes such as the 1857 Basilicata earthquake. Pleistocene extensional tectonics is commonly envisaged as responsible for the basin evolution. On the grounds of new structural studies, indeed, the valley appears to be a more complex structure than a simple extensional graben, as traditionally assumed in the literature, or than a pull-apart basin, as suggested by some workers. The basin floor is filled by middle Pleistocene faulted alluvial deposits. A new survey has shown evidence of deformation also in younger sediments. At Viggiano, located along the eastern flank of the basin, recent slope deposits still attached to their source area display fault-controlled sedimentation. In this area, different climate-sedimentary cycles represented by coarse breccia talus alternated with palaeosoils are involved in the recent deformation. At Pergola, located a few kilometres northwest of the Agri high valley, the most recent fan deposits found at the foot of a major slope, including evenly bedded breccia and intercalated palaeosoils, are strongly faulted and tilted. In order to establish precise chronological constraints, palaeosoils have been sampled in several sites and at different stratigraphic levels. Radiocarbon dating supports the field evidence of very recent deformation associated to relevant displacements, yielding ages between 40 and 20 ka.

University of Rome Carbon-14 Dates XII

This list includes age measurements carried out from January 1972 to December 1973 with previously described CO 2 -proportional counters (Alessio et al , 1970). All archaeologic and geologic samples but one come from Italian territory.

University of Rome carbon-14 dates IV.

Carbon-14 ages are reported from geologic samples of Italian localities and archaeologic samples from localities in Italy and elsewhere.

University of Rome carbon-14 dates II.

Continuation of a series of age measurements of archeologic materials from Italian and other localities and geologic materials (mainly Holocene peats) from the Piedmont region and other Italian localities.

University of Rome carbon-14 dates VII.

Carbon-14 ages, geologic and archaeologic samples, Italy, Sardinia, Pakistan, for reference to dates VI, see this Bibliography Vol. 33, No. 2, 06 E69-02584.

University of Rome carbon-14 dates III.

This is a continuation of a series of age measurements of archaeologic and geologic samples from Italian and other localities. (For reference to previous list, see this Bibliography Vol. 29, p. 9.).

University of Rome carbon-14 dates V.

Carbon-14 dates are reported for geologic samples from Italian localities and for archaeologic samples from localities in Italy and elsewhere.

(super 14) C tephrochronology with different fractions of Paleosol humic matter at Procida Island, Italy.

14C apparent ages along with 613C values for three different fractions of humic matter (HM) isolated from a suite of four paleosols (PAs) interbedded within tephra are reported. The dated HM fractions were: 1) HA, the easily released humic acids; 2) HAtot, the bulk of humic acids; 3) RES, the insoluble HM. The 14C sequence dated from 13,000-25,000 BP, in agreement with stratigraphy and previous data. Age differences up to 2540±430 were statistically significant among fractions; their order of magnitude being independent from C content and depth. All the PAs showed a common pattern of among-fraction age variation, 14C agingltrending from RES to HA101 through HA. As the HM fractions exhibited quite comparable S 3C values (b C = -25.4±0.2%o), it is inferred that the primitive organic matter (OM) input to PAs was dominantly supplied by vegetation of C-3 photosynthetic pathway which underwent complete decomposition during diagenesis.

University of Rome Radiocarbon Dates XVII

This list includes dates from Italy, Libyan Sahara, Niger and the Dahlak Islands, obtained from 1976 to 1980, using the benzene scintillation method. Chemical processing from sample to benzene follows procedures of Alessio et al (1978a). Standard pretreatment for wood and charcoal included boiling with 5-10% HCL. Pretreatment for a-labeled samples underwent leaching with 0.2N NaOH. Since the last date list, Lecroy NIM modules have replaced the original recording electronics for the liquid scintillation detection system, described in Alessio et al (1973, 1976). Benzene sample volumes up to 4.Sml, with appropriate amounts of NE 216 scintillator (Nuclear Enterprises, Ltd) yielded the best figure-of-merit (E2/B = 2300) for 2m1 benzene and an efficiency of 72%. Age calculations comply with standard Radiocarbon protocol, as Stuiver and Polach (1977) recommended, including normalization by mass spectrometrically determined S13C (Alessio et al 1969).