Late Eocene to early Oligocene carbonate and barite accumulation rates in the Pacific Basin

The late Eocene through earliest Oligocene (40-32 Ma) spans a major transition from greenhouse to icehouse climate, with net cooling and expansion of Antarctic glaciation shortly after the Eocene/Oligocene (E/O) boundary. We investigated the response of the oceanic biosphere to these changes by reconstructing barite and CaCO3 accumulation rates in sediments from the equatorial and North Pacific Ocean. These data allow us to evaluate temporal and geographical variability in export production and CaCO3 preservation. Barite accumulation rates were on average higher in the warmer late Eocene than in the colder early Oligocene, but cool periods within the Eocene were characterized by peaks in both barite and CaCO3 accumulation in the equatorial region. We infer that climatic changes not only affected deep ocean ventilation and chemistry, but also had profound effects on surface water characteristics influencing export productivity. The ratio of CaCO3 to barite accumulation rates, representing the ratio of particulate inorganic C accumulation to Corg export, increased dramatically at the E/O boundary. This suggests that long-term drawdown of atmospheric CO2 due to organic carbon deposition to the seafloor decreased, potentially offsetting decreasing pCO2 levels and associated cooling. The relatively larger increase in CaCO3 accumulation compared to export production at the E/O suggests that the permanent deepening of the calcite compensation depth (CCD) at that time stems primarily from changes in deep water chemistry and not from increased carbonate production.

U-M Softball Team, 1999

Front Row: Pam Kosanke, Blanca LeBron (mgr.), Traci Conrad (captain), Catherine Davie, Tammy Mika (captain), Carrie Silver (mgr.).

Middle Row: Rebecca Tune, Marie Barda, Melissa Gentile, Jamie Gillies, Courtney Murdock, Kate Eiland, Karmen Lappo.

Back Row: Kristen Hunter, Stefanie Volpe, Mary Conner, Kelsey Kollen, Chrissy Garza, Melissa Taylor, Lisa Beard, Kim Bugel.

1989/1990 UM Women's Basketball Team

Back Row: ass't coach Kathy LaBarge, ass't coach Debbie Norman, Stacie McCall, Jen Nuanes, Char Durand, Jill VanStee, Trish Andrew, Torie Shaw, Nikki Beaudry, Leah Wooldridge, trainer Sue Peel, head coach Bud VanDeWege

Front Row: ?, Barb Loeher, Tempie Brown, Joan Rieger, Tanya Powell, Val Hall, Leslie Spicer, Carol Szczechowski, ?

not pictured: Michelle Hall, Kristen Dierdorf

Women's Volleyball Team, 1994, UM

Front Row: athletic trainer Keli Coughlin, Julie Scherer, Linnea Mendoza, Jane Stevens, Erin McGovern, Meg Akehi, Chereena Tennis, Emily Carr, Berit Volstad, asst. coach Jennifer Dhaenen

Back Row: head coach Greg Giovanazzi, Shareen Luze, Shannon Brownlee, Suzy O'Donnell, Darlene Recker, Aimee Smith, Colleen Miniuk, Sarah Jackson, Ramona Cox, asst. coach Mora Kanim.

Not pictured: Kristen Ruschiensky.

Women's Volleyball Team, 1995, UM

Front Row: Colleen Miniuk, Sarah Jackson, Darlene Recker, Shannon Brownlee, Suzy O'Donnell, Ramona Cox, Kristen Ruschiensky, administrative assistant Susan McAvoy

Back row: Meg Akehi, assistant coach Amy Verhoeven, Chereena Tennis, head coach Greg Giovanazzi, Shareen Luze, Karen Chase, Linsey Ebert, Jeanine Szczesniak, Jane Stevens, Erin McGovern, Linnea Mendoza, assistant coach Mora Kanim, athletic medicine Keli Coughlin.

Women's Volleyball Team, 1996, UM

Front Row: athletic trainer Keli Coughlin, assistant coach Irene Renteria, head coach Greg Giovanazzi, assistant coach Mora Kanim, student trainer Suzanne Dolembo.

Middle Row: Erin McGovern, Ramona Cox, Sarah Jackson, Colleen Miniuk, Shareen Luze, Darlene Recker, Kristen Ruschiensky, Jane Stevens, Chereena Tennis, Linnea Mendoza, Meg Akehi.

Back Row: Carrie Ricker, Kiley Hansen, Shari Turner, Linsey Ebert, Anne Poglits, Jennifer Allen, Karen Chase, Maggie Cooper, Jeanine Szczesniak.

University of Michigan Women's Golf Team, 1988/89

Back Row: Jennifer Boring, :Lisa Mahnke, Erica Zonder, Mary Hartman, head coach Sue LeClair

Front Row: Kimberly Schlaff, Kristen Beilstein, Becky Hayes, Darcy Chandler

University of Michigan Women's Golf Team, 1989/90

Back Row: Carrie Nosanchuk, Jennifer Tejada, Mary Hartman, Erica Zonder, Tricia Good, Lisa Mahnke, Maura Hawkins, head coach Sue LeClair

Front Row: Jennifer Boring, Wendy Bigler, Kristen Bielstein, Darcy Chandler, Becky Hayes

[A collection of stories and miscellaneous articles translated into Danish from English and other languages, including some articles written originally in Danish.]

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