Sedimentology of surface samples from the Weddell Sea, Antarctica

Mineralogical and granulometric properties of glacial-marine surface sediments of the Weddell Sea and adjoining areas were studied in order to decipher spatial variations of provenance and transport paths of terrigenous detritus from Antarctic sources. The silt fraction shows marked spatial differences in quartz contents. In the sand fractions heavy-mineral assemblages display low mineralogical maturity and are dominated by garnet, green hornblende, and various types of clinopyroxene. Cluster analysis yields distinct heavy-mineral assemblages, which can be attributed to specific source rocks of the Antarctic hinterland. The configuration of modern mineralogical provinces in the near-shore regions reflects the geological variety of the adjacent hinterland. In the distal parts of the study area, sand-sized heavy minerals are good tracers of ice-rafting. Granulometric characteristics and the distribution of heavy-mineral provinces reflect maxima of relative and absolute accumulation of ice-rafted detritus in accordance with major iceberg drift tracks in the course of the Weddell Gyre. Fine-grained and coarse-grained sediment fractions may have different origins. In the central Weddell Sea, coarse ice-rafted detritus basically derives from East Antarctic sources, while the fine-fraction is discharged from weak permanent bottom currents and/or episodic turbidity currents and shows affinities to southern Weddell Sea sources. Winnowing of quartz-rich sediments through intense bottom water formation in the southern Weddell Sea provides muddy suspensions enriched in quartz. The influence of quartz-rich suspensions moving within the Weddell Gyre contour current can be traced as far as the continental slope in the northwestern Weddell Sea. In general, the focusing of mud by currents significantly exceeds the relative and absolute contribution of ice-rafted detritus beyond the shelves of the study area.

Radon 222 excess measured on water bottle samples during HEINCKE cruise HE153

In the years 2000 and 2001 we measured methane concentrations exceeding up to two orders of magnitude the equilibrium with the atmosphere in the water column on the SW-Spitsbergen continental shelf. This methane anomaly extended from its centre on the shelf westwards over the upper slope and eastwards well into the inner basins of the two southernmost Spitsbergen fjords, the Hornsundfjord and the van Mijenfjord. Methane concentrations and stable carbon isotopic ratios varied between 2 and 240 nM, and between -53 per mill and -20 per mill VPDB, respectively. Methane in high concentrations was depleted in 13C whereas in low concentrations d13CCH4 values were highly variable. On the continental shelf we found that methane discharged from seeps on top of sandy and gravelly banks is isotopically heavier than methane escaping from troughs filled with silty and clayey sediments. These distinct isotopic signatures suggest that methane is gently released from several inter-granular seepages or micro-seepages widely spread over the shelf. A potential migration path for thermogenic or hydrate methane may be the Hornsund Fracture Zone, a south-north running reactivated fault system created by stretching of the continental crust. After discharge into the water column, local water currents fed by Atlantic water, coastal water, and freshwater outflows from the fjords further determine pathways and fate of the methane. We used d18Owater and 222Rn data to trace origin and advection of the local water masses and water mixing processes. Methane spreads predominantly along pycnoclines and by vertical mixing. During transport methane is influenced simultaneously by oxidation and dilution, as well as loss into the atmosphere. Together these processes cause the spatial variability of the anomaly and heterogeneity in d13CCH4 in this polar shelf environment.

Proposed standard for radon-222 emissions from licensed uranium mill tailings : draft economic analysis /

"40 CFR Part 61, national emission standards for hazardous air pollutants."

Cost evaluation for nine Federal Motor Vehicle Safety Standards. Volume VI: FMVSS 220, 221 and 222. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Statistical evaluation of the effectiveness of Federal Motor Vehicle Safety Standard 222: School Bus Seating and Crash Protection. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Das illustrirte Mississippithal : dargestellt in 80 nach der Natur aufgenommenen Ansichten vom Wasserfalle zu St. Anthony an bis zum Golf von Mexico (eine Entfernung von ungefähr 2300 englischen Meilen) /

Cf. Sabin 40807.

Evaluation methodologies for nine Federal Motor Vehicle Safety Standards: FMVSS 105, 108, 122, 202, 207, 213, 220, 221, 222. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Final design and implementation plan for evaluating the effectiveness of FMVSS 220--school bus rollover protection, FMVSS 221--school bus body joint strength, FMVSS 222--school bus seating and crash protection.

National Highway Traffic Safety Administration, Washington, D.C.

Water Resources Development Act of 1985 [microform] : hearings before the Subcommittee on Water Resources of the Committee on Environment and Public Works, United States Senate, Ninety-ninth Congress, first session on S. 366 ... S. 534 ... May 10 and 16, 1985.

CIS Microfiche Accession Numbers: CIS 85 S321-27

Comedias del célebre poeta español Don Pedro Calderon de la Barca ... que saca a luz Don Juan Fernandez de Apontes ...

Contiene: Fortunas de Andrómeda y Perseo (pp. 1-52) ; El Joseph de las mugeres (pp. 53-92) ; Los empeños de un acaso (pp. 93-138) ; Primero soy yo (pp. 139-180) ; La estatua de Prometeo (pp. 181-221) ; El secreto a voces (pp. 222-270) ; Dar tiempo al tiempo (271-317) ; El mágico prodigioso (pp. 318-365) ; Mejor está que estaba (pp. 366-409) ; Fieras afemina amor (con Loa) (pp. 410-475)

Das Schaltjahr : welches ist der teutsch Kalender mit den Figuren, und hat 366 Tag /

Contiene: 1. Bd.: Januar I (655 p.) -- 2. Bd.: Januar II (731 p.) -- 3. Bd.: Januar III (741 p.) -- 4. Bd.: Januar IV (719 p.) -- 5. Bd.: Januar V (724 p.)

Weather summary, West Indies, for use with Naval air pilots, H. O. pub. nos. 365 and 366.

Mode of access: Internet.