(Table T1) Correlations between marker beds and drill holes for ODP Leg 171B sites

More than 50 discrete volcanic ash layers were recovered at the five drill sites of the Blake Nose depth transect (Leg 171B, western central Atlantic). The majority of these ash layers are intercalated with Eocene hemipelagic sediments with a pronounced frequency maximum in the upper Eocene. Several ash layers appear to be deposited from volcanic fallout with little or no indication of secondary remobilization. They provide excellent stratigraphic markers for a correlation of the Leg 171B drill sites. Other ash layers were probably redeposited from volcaniclastic-rich turbidity currents, but they still represent geologically instantaneous events that can be used in stratigraphic correlation between adjacent drill holes. Additional nonvolcanic marker beds, like the suspect late Eocene impact event layer, were included in our hole-to-hole correlations. Stratigraphic and downcore positions of marker beds were compiled and plotted against existing composite depth records that were constructed to guide high-resolution sampling. Comparison of our correlation with the spliced composite sections of each drill site reveals several minor and some major discrepancies. These may result from drilling distortion or missing sections, from the lack of unambiguous criteria for the synchronism of ash layers, or from the systematic exclusion of marker-bed data in the construction of the spliced record. Integration of both correlation approaches will help eliminate most of the observed discrepancies.

Ground-based electromagnetic (EM) and drill-hole ice and snow thickness measurements during Polarstern cruise ARK-XVII/2 in 2001

Late-summer thickness distributions of large ice floes in the Transpolar Drift between Svalbard and the North Pole in 1991, 1996, 1998, and 2001 are compared. They have been derived from drilling and electromagnetic (EM) sounding. Results show a strong interannual variability, with significantly reduced thickness in 1998 and 2001. The mean thickness decreased by 22.5% from 3.11 m in 1991 to 2.41 m in 2001, and the modal thickness by 22% from 2.50 m in 1991 to 1.95 m in 2001. Since modal thickness represents the thickness of level ice, the observed thinning reflects changes in thermodynamic conditions. Together with additional data from the Laptev Sea obtained in 1993, 1995, and 1996, results are in surprising agreement with recently published thickness anomalies retrieved from satellite radar altimetry for Arctic regions south of 81.5°N. This points to a strong sensitivity of radar altimetry data to level ice thickness.

Medical support in divisions, separate brigades, and the armored cavalry regiment.

"Manual supersedes FM 8-15, January 1971.

A drill book in the etymology and syntax of the English language.

Mode of access: Internet.

Wide-awakes hand book : Manual of drill, portraits of candidates, and instructions for forming political clubs and companies /

Poll sheets, 9 blank pages at end.

The examination of drill cuttings and the application of the results obtained to the solving of field problems /

Mode of access: Internet.

Drill regulations and service manual for sanitary troops, United States Army, 1914. Corr. to April 15, 1917. (Changes, nos. 1 to 4)

Mode of access: Internet.

Tactical principles and logistics for cavalry.

Mode of access: Internet.

Boots and saddles : a history of the first volunteer cavalry of the war, known as the First New York (Lincoln) Cavalry, and also as the Sabre Regiment /

"Its organization, campaigns and battles."

A history of the Eighth Regiment of New Hampshire Volunteers, including its service as infantry, Second N. H. Cavalry, and Veteran Battalion in the Civil War of 1861-1865, covering a period of three years, ten months, and nineteen days.

For roster see New Hampshire. Adjutant-General. Complete roster of the 8th Regt. (189-?)

History of the organization and service, during the war of the rebellion, of Co. A, 14th Pennsylvania Cavalry /

Mode of access: Internet.