(Table 1) Soil density and concentration of 10Beryllium and 26Aluminium in samples from two ash deposits in the McMurdo Dry Valleys

The McMurdo Dry Valleys, Antarctica (MDV) are among the oldest landscapes on Earth, and some landforms there present an intriguing apparent contradiction such that millions of years old surface deposits maintain their meter-scale morphology despite the fact that measured erosion rates are 0.1-4 m/Ma. We analyzed the concentration of cosmic ray-produced 10Be and 26Al in quartz sands from regolith directly above and below two well-documented ash deposits in the MDV, the Arena Valley ash (40Ar/39Ar age of 4.33 Ma) and the Hart ash (K-Ar age of 3.9 Ma). Measured concentrations of 10Be and 26Al are significantly less than expected given the age of the in situ air fall ashes and are best interpreted as reflecting the degradation rate of the overlying sediments. The erosion rate of the material above the Arena Valley ash that best explains the observed isotope profiles is 3.5 ± 0.41 x 10**-5 g/cm**2/yr (~0.19 m/Ma) for the past ~4 Ma. For the Hart ash, the erosion rate is 4.8 ± 0.21 x 10**-4 g/cm**2/yr (~2.6 m/Ma) for the past ~1 Ma. The concentration profiles do not show signs of mixing, creep, or deflation caused by sublimation of ground ice. These results indicate that the slow, steady lowering of the surface without vertical mixing may allow landforms to maintain their meter-scale morphology even though they are actively eroding.

Geochemistry of silicate melt inclusions from ODP Holes 137-504B and 140-504B

Geochemical data from plagioclase-hosted silicate melt inclusions from Leg 140, Hole 504B diabase dikes are reported. Hand-picked plagioclase grains were heated to 1260°-1280°C to remelt the glass inclusions and to infer trapping temperatures. The samples were then polished to expose the inclusions, which were analyzed by electron and ion microprobes. Inclusion compositions are mainly in equilibrium with the host plagioclase and are more depleted in incompatible elements than the host rock. Simple crystal-liquid equilibrium calculations show that the melt inclusions could have been in equilibrium with depleted abyssal peridotite diopsides, whereas whole-rock basalt compositions generally could not have been. The melt inclusions are significantly more depleted than normal (N-type) mid-ocean-ridge basalt (MORB) and are consistent with being produced by 8%-16% incremental or open-system melting with 2% residual porosity in the peridotite source. These magmas were formed during pressure-release melting of the mantle over a range of depths between 30 and 15 km.

Effective speech, including public speaking, mental training and the development of personality /

v. 1. Manual I-II. -- v. 2. Manual III-IV. -- v. 3. Manual V-VI. -- v. 4. Manual VII-VIII. -- v. 5. Manual IX-X. -- v. 6. Manual XI-XII.

Christ Returning from the Temple with Joseph and Mary, only state

Rembrandt van Rijn; 3 5/8 in.x 5 5/8 in.; etching with drypoint

Scene from the Wedding of Messalina and Gaius Silius, possibly an episode from a Play (Brothel Scene)

Nikolaus Knupfer; 1 ft. 11 5/8 in.x 2 ft. 5 21/64 in.; oil on panel

Joseph and Potiphar's Wife

Rembrandt van Rijn; 3 5/8 in.x 4 31/64 in.; etching on paper

Joseph Telling His Dreams

Rembrandt van Rijn; 1 ft. 8 5/64 in.x 1 ft. 3 23/64 in.; oil on paper

Woman In Blue Reading a Letter

Johannes Vermeer; 1 ft. 6 5/16 in.x 1 ft. 3 23/64 in.; oil on canvas

The Vegetable Market

Hendrik Martensz. Sorgh; 1 ft. 8 5/64 in.x 2 ft. 3 61/64 in.; oil on panel

The Emperor Shah Jahan with his Son Dara Shikoh", Folio from the Shah Jahan Albu

Nanha; 1 ft. 3 5/16 in.x 10 5/16 in.; album leaf, ink, opaque watercolor, and gold on paper Margins: Gold and opaque watercolor on dyed paper

Casket

Ivory, Spanish, 11C; 10 35/64 in.x 10 5/16 in.x 6 3/8 in.; ivory with silver mounts

Preparatory drawing for a print in the seies Hyakunin isshu uba ge etoki: Ki no Tomonori

Katsushika Hokusai; 10 5/32 in.x 1 ft. 2 7/8 in.; ink on paper

Bowl with Figures

Pottery, Iran, Samanid; 3 5/8 in.x 7 7/8 in.; earthenware; polychrome decoration under transparent glaze (buff ware)

Mihrab

11 ft. 3 5/64 in. x 9 ft. 5 21/32 in.; mosaic of polychrome-glazed cut tiles on stone-paste (fritware) body; set into mortar