Interstitial water chemistry of DSDP Leg 85 sites

The concentration changes in pore waters of dissolved calcium, magnesium, sulfate, strontium, and silica and of alkalinity are controlled by diagenetic reactions occurring within the biogenic sediments of DSDP Sites 572, 573, and 574. Downcore increases in dissolved Sr2 + indicate recrystallization of calcite, and increases in dissolved SiO2 reflect dissolution of amorphous silica. Minor gradients in dissolved Ca(2+) and Mg(2+) suggest little if any influence from reactions involving volcanic sediments or basalt. Differences in interstitial water profiles showing the downhole trends of these chemical species mark variations in carbonate and silica diagenesis, sediment compositions, and sedimentation rate histories among the sites. The location and extent of carbonate diagenesis in these sediments are determined from Sr/Ca distributions between the interstitial waters and the bulk carbonate samples. Pore water strontium increases in the upper 100 to 250 m of sediment are assumed to reflect diffusion from underlying zones where calcite recrystallization has occurred. On the basis of calculations of dissolved strontium production and comparisons between observed and calculated "equilibrium" Sr/Ca ratios of the solids, approximately 30 to 50% of the carbonate has recrystallized in these deeper intervals. These estimates agree with the observed amounts of chalk at these sites. Variations in Sr/Ca ratios of these carbonates reflect differences in calcareous microfossil content, in diagenetic history, and, possibly, in changes in seawater Sr/Ca with time. Samples of porcelanite recovered below 300 m at Site 572 suggest formation at temperatures 20 to 30° C greater than ones estimated assuming oceanic geothermal gradients from sedimentary sections similar to those recovered on Leg 85. The higher temperatures may partially account for higher Sr/Ca ratios determined for recrystallized carbonates from this site.

1994 University of Michigan Wrestling Team

Front Row: Greg DeLeon, Brady Vibert, Regan Rutledge, Andy Behm, Tim Stringer, Andy Howe, Matt Stout, Hector Castenada, Shawn Contos, Kendrick Kakasu, David O'Meara

Middle Row: Jon Newson, Josh Young, Bryan Sosinski, Drew Pullen, Jason Balcom, Jake Young, Brian Harper, Sean Bormet, Jeff Catrabone, Brian Freeman, Bill Lacure, Mike Ellsworth

Back Row: head coach Dale Bahr, assistant coach Kirk Trost, Mark Dankow, Olanrewaju Olabisi, Jake Pyle, Zachary Feldman, Jesse Rawls, Jr., Alex Garber, Kyle Steinacker, Steve King, Kevin Williams, Jehad Hamdan, trainer Brent Jaco, assistant coach John Fisher, assistant coach Joe McFarland

1995 University of Michigan Wrestling Team

Front row (left to right): Chris Viola, Brian Aparo, Andy Behm, Matt Stout, Greg DeLeon, Meldon Street, Tim Stringer, Brandon Howe, Brady Vibert, Kendrick Kakazu, Steve Basmajian, Frank Nocito

Second row: Assistant coach Joe McFarland, Drew Pullen, Jason Balcom, Brian Freeman, Jake Young, Jehad Hamdan, Mike Ellsworth, Bill Lacure, Regan Rutledge, Eric Zimmerman, Matt Shear, Jeff Catrabone

Back row: Assistant coach Kirk Trost, Erik Willer, Jon Newsom, Chad Biggert, Olanrewaju Olabisi, Kyle Steinacker, Zachary Feldman, Harland Hohman, Airron Richardson, Keith Meyers, Jim Kaiser, head coach Dale Bahr.

Performance characteristics of automotive engines in the United States. Second series--report no. 1. 1976 Chevrolet Vega 140 CID (2.3 liters), 2V. Interim report.

Transportation Systems Center, Cambridge, Mass.

Performance characteristics of automotive engines in the United States. Second series--report no. 2. 1976 Chevrolet 305 CID (5.0 liters), 2V. Interim report.

Transportation Systems Center, Cambridge, Mass.

Performance characteristics of automotive engines in the United States. Second series--report no. 3. 1977 Chrysler 225 CID (3.7 liters), 2V. Interim report.

Transportation Systems Center, Cambridge, Mass.

Performance characteristics of automotive engines in the United States. First series--report no. 16. 1975 Volvo 121 CID (2.0 liters), F.I. Interim report.

Transportation Systems Center, Cambridge, Mass.

Performance characteristics of automotive engines in the United States. First series--report no. 17. 1975 Buick 455 CID (7.5 liters), 4V. Interim report.

Transportation Systems Center, Cambridge, Mass.National Highway Traffic Safety Administration, Office of Research and Development, Washington, D.C.

Performance characteristics of automotive engines in the United States. First series--report no. 20. 1975 Chevrolet 350 CID (5.7 liters) with Dresser variable - area Venturi system. Interim report.

Transportation Systems Center, Cambridge, Mass.

Performance characteristics of automotive engines in the United States. Second series--report no. 4. 1976 Chevrolet 85 CID (1.4 liters), 1V. Interim report.

Transportation Systems Center, Cambridge, Mass.

Performance characteristics of automotive engines in the United States. Second series--report no. 6. 1976 Nissan diesel 198 CID (3.2 liters), F.I. Interim report.

Transportation Systems Center, Cambridge, Mass.

Performance characteristics of automotive engines in the United States. Second series--report no. 7. 1977 Ford 171 CID (2.8 liters), 2V. Interim report.

Transportation Systems Center, Cambridge, Mass.

Performance characteristics of automotive engines in the United States. First series--report no. 15. 1975 Dodge Colt 98 CID (1.6 liters), 2V. Interim report.

Transportation Systems Center, Cambridge, Mass.

Performance characteristics of automotive engines in the United States. Third series-- report no. 1. 1977 Volvo 130 CID (2.1 liters), F.I. Interim report.

Transportation Systems Center, Cambridge, Mass.

Performance characteristics of automotive engines in the United States. Third series - report no. 11, 1978 Oldsmobile Diesel, 350 C10 (5.7 liters), F.I. Interim report.

National Highway Traffic Safety Administration, Office of Research and Development, Washington, D.C.