Argentina Range

The Patuxent Range consists of folded and regionally metamorphosed turbidites composed of the alternating layers of graywacke and shale of the Patuxent Formation. At the southern tip of the Patuxant Range the turbidites contain sills of diabase and are in contact with Cambrian limestone of the Nelson Formation. Still farther south, outcrops of Devonian sandstone exist, but the relationship of the Nelson Limestone and the Devonian sandstone to the turbidites of the Patuxant Formation is not clear at this locality. 

In the Schmidt Hills the turbidites of the Patuxant Formation contain diabase sills, pillow basalt, and fel-sic porphyry. In the Williams Hills the Patuxant Formation contains basalt flows and felsic porphyry, but diabase sills are absent. In spite of its close proximity to the Schmidt and Wilhams hills, the turbidite basement complex of the main body of the Neptune Range does not contain basaltic or felsic volcanic rocks. The difference has been attributed to the presence of a fault in the Roderick Valley that lies between the Neptune Range and the Schmidt and William hills and that may have moved these parts of the Pensacola Mountains closer together. 

In addition, the turbidite basement complex of the Neptune Range is unconformably overlain by the Middle Cambrian Nelson Limestone which is absent from the Schmidt and Williams hiUs. Therefore, the age of the turbidites that underlie the Nelson Limestone in the Neptune Range must be pre-Middle Cambrian , whereas the turbidites in the Schmidt and Williams Hills where the Nelson Limestone are absent are post-Middle Cambrian in age as confirmed by isotopic age determinations. This confusing situation was resolved 

A unique feature of the Pensacola Mountains is that Paleozoic formations of the Neptune and the Forrestal ranges were folded during the Weddell Orogeny of late Paleozoic age. This event distinguishes the Paleozoic formations of the Pensacola Mountains from the sedimentary rocks of the Beacon Supergroup elsewhere in the Transantarctic Mountains which have low dips of less than 10° and were folded only locally along faults. 

The Argentina Range is an extension of the Pensacola Mountains along the coast of the Ronne Ice Shelf. This small mountain range consists of three clusters of nunataks located at about 82°20 S and 042°00 W which form the Schneider Hills, Mt. Ferrara, and the Panzarini Hills in Fig. 8.17. The Schneider Hills are separated from the Dufek Massif and the Forrestal Range of the Pensacola Mountains by the Support Force Glacier which channels the East Antarctic Ice Sheet into the Ronne Ice Sheet. 

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The geology of the Argentina Range in Fig. 8.17 includes a complexly folded sequence of interbedded graywacke and slate that Schmidt and Ford (1969) tentatively assigned to the Patuxent Formation of Neoproterozoic age. However, Rowell et al. (2001)... 

Limestones that occur in the Schneider Hills of the Argentina Range strike northeast and dip steeply to the east. Schmidt and Ford (1969) placed them into the Nelson Limestone, whereas Rowell et al. (2001) considered them to be a facies of the Early Cambrian Hannah Ridge Formation. Schmidt and Ford (1969) reported that the limestone exposed at Ruthven Bluff in the Schneider Hills contains abundant archaeocya-thids and that the limestone was intruded by sills of... 

Sills of Ferrar Dolerite also intruded the Nelson Limestone (Cambrian) in the Schneider Hills of the Argentina Range (Section 8.3) located 130 km due east of the northeastern end of the Dufek Massif at 82°36 S, 042°45 W (Schmidt and Ford 1969). The dolerite sills... 

Wool belongs to a family of proteins, the keratins, that also includes hair and other types of animal protective tissues such as horn, nails, feathers, and the outer skin layers. The relative importance of wool as a textile fiber has declined over the decades as synthetic fibers have increa singly been used in textile consumption. Wool is still an important fiber in the middle and upper price ranges of the textile market. It is also an extremely important export for several nations, notably AustraUa, New Zealand, South Africa, and Argentina and commands a price premium over most other fibers because of its outstanding natural properties of soft handle (the feel of the fabric), moisture absorption abiUties (and hence comfort), and superior drape (the way the fabric hangs) (see Fibers Textiles). Table 2 shows wool production and sheep numbers in the world s principal wool-producing countries. 

While 1 was in Argentina in 1955, Sabato took me to visit a brand new laboratory in Patagonia, deep in the south , near the ski resort of San Carlos de Bariloche. This was, and still is, the Centro Atomico de Bariloche (CAB). It is an institution (formally part of a local university) for research and teaching in physics, ranging from particle physics to solid-state physics. Its origin is one of the most curious in the entire history of academe. 

We here summarize work we have done with a moth, Utetheisa ornatrix, that has a dependence on certain plant alkaloids. The moth uses the compounds for defense and for production of a pheromone that plays a decisive role in sexual selection. The species has a broad range, extending through North America east of the Rockies and southward into Brazil, Argentina, and Chile. Our studies were done mostly with populations of the moth from central Florida. 

Phosphorites (manne apatites) are dense, hght-brown-to-black concretions, ranging in size from sands to nodules and irregular masses. Phosphorites have been found off Argentina, Chile, Japan, Mexico, Peru, South Africa, and Spain, and several islands in the Indian Ocean. Some also have been found off the west coast of North America and on the eastern North American continental shelf These deposits occur where water upwelling transports phosphorus and where the rate of sedimentation is slow. The... 

Comparison of the level of POPs contamination in marine sediment of Hong Kong and other countries/regions was made based on best available data and the results are summarized in Table 7.6. Overall, the level of POPs measured in local marine surface sediment was comparable to those reported in most other locations around the world. For DDT, a POPs pesticides of regional interest, the level of mean local sediment contamination was found to be well within the range reported in the Pearl River Estuary (Li et al., 2001), the east coast estuaries of China (Yuan et al., 2001), the coast of Argentina (Menone et al., 2001), the Netherlands (Stronkhorst and Hattum, 2003) and Pakistan (Sanpera et al., 2003), and... 

Due to the economic incentives for conversion of skim milk to powdered lowfat milk in the United States and Canada, nearly all of the casein used by U.S.-adhesives manufacturers comes from overseas. Casein has, at various times, been imported from 20 different countries. Australia, New Zealand, Uruguay, France, Norway, Holland, Ireland, and Argentina are probably the most important producers in the Western World today. The worldwide nature of casein production leads to a wide range in product quality. 

Commercial plants Three commercial plants are in operation in Argentina and Canada with capacities from 140,000 to 816,000 mtpy. They process ethylene feedstocks with purities ranging from 75% ethylene to polymer-grade ethylene. An 850,000-mtpy unit using dilute ethylene is currently under construction. 

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