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.

Radiolarian-based bransfer function for the estimation of sea surface temperatures in the Southern Ocean (Atlantic Sector)

A new radiolarian-based transfer function for sea surface temperature (SST) estimations has been developed from 23 taxa and taxa groups in 53 surface sediment samples recovered between 35° and 72°S in the Atlantic sector of the Southern Ocean. For the selection of taxa and taxa groups ecological information from water column studies was considered. The transfer function allows the estimation of austral summer SST (December-March) ranging between -1 and 18°C with a standard error of estimate of 1.2°C. SST estimates from selected late Pleistocene squences were sucessfully compared with independend paleotemperature estimates derived from a diatom transfer function. This shows that radiolarians provide an excellent tool for paleotemperature reconstructions in Pleistocene sediments of the Southern Ocean.

Defensa de la Real Yeguada á consecuencia de lo que de ella se ha dicho en los números 341 y 342 del Boletín de Veterinaria... [y otras obras]

Mode of access: Internet.

Diui Mesue et noua quedam vltra ea que secum associari co[n]sueueru[n]t Opera ... Mundini de lentiis super canones eius vniversales expositio luculentissima. Christophori Georgii florentini super eius antidotarium expositio clarissima. Christophori eiusdem tractatus de aqua & ptisana ordeacea conficienda fo. 98. Petri Apponensis fructuose additiones. fo. 142. Nicolai medicorum expertissimi antidotarium paruum. fo. 271. Ioa[n]nis de Sancto amando super idem Nicolai antidotarium expositio facu[n]dissima. fo. 303. De quid pro quo. i. de simplicibus in eade[m] operatione co[m]municantibus assu[m]matio. fo. 342. Synonimorum medicinalium. i. nominum ide[m] medicinale significantium tractatus. fo. 342. Bulcasis siue seruitoris medicorum profundissimi libellus copiosissimus. fo. 346. Preclarum Saladini pro aromatariis compendium. fo. 357. Gentilis Fulginei de dosi medicinarum inuestiganda libellus. fo. 339. Alchi[n]di medicorum... de medicinaru[m] co[m]positar[um] gradib[us] i[n]uestiga[n]dis libellus. 373. Subtilissimus Habe[n]guefit de simplicibus medicinis libellus. fo. 369. Egregius Apulei... de ponderibus et mensuris libellus. fo. 372. Antidotorum in Mesue & Nicolai antidotariis contentorum index. fo. 377. Remediorum variis egritudinibus conferentium summula copiosissima. fo. 38. Additiones noue ad multa i[n] Mesue & Nicolai antidotariis...

Contiene además las adiciones de Francesco di Piedimonte al Grabadin de Mesue (f. 142-271), y el comentario de Matthaeus Platearius al Antidotarium de Nicolás Salernitano (f. 271-303), acompañado del texto original.

Unit maintenance repair parts and special tools lists : tractor, wheeled, industrial, diesel driven, med DBP, with dozer, with backrip scarifier, with drawbar, trailer pintle, and hydraulic scraper controls, NSN 2420-00-088-9384, Clark model 290M, with ROPS, NSN 2420-01-059-0090.

"June 1992."

Operator's and unit maintenance manual : simulator, detector unit, chemical agent automatic alarm, M81 (NSN 6665-01-088-4789).

Includes index.

Organizational maintenance repair parts and special tools lists : tractor, wheeled, industrial, diesel driven, med DBP, w/dozer, w/backrip scarifier, w/drawbar, trailer pintle and hydraulic scraper controls, NSN 2420-00-088-9384 (Clark model 290M), w/ROPS, NSN 2420-01-059-0090.

Includes index.

Direct support, general support and depot maintenance manual : tractor, wheeled, industrial, diesel driven, med, dbp, w/dozer, w/scarifier, w/drawbar, trailer pintle and hydraulic scraper controls (Clark model 290M), FSN 2420-088-9384.

Includes index.