A foraminiferal d18O record of sediment core GT90-3 covering the last 2,200 years

For many years the Torino Cosmogeophysics group has been studying sediment cores drilled from the Gallipoli Terrace in the Gulf of Taranto (Ionian Sea) and deposited in the last millennia. The gravity core GT90-3, in which the 18O series was measured, was drilled from the Gallipoli Terrace in the Gulf of Taranto (Ionian Sea) at 39°45'53''N, 17°53'33''E. It was extracted at a depth of 178 m and its length is 3.57 m. Thanks to its geographical location, the Gallipoli Terrace is a favourable site for climatic studies based on marine sediments, because of its closeness to the volcanically active Campanian area, a region that is unique in the world for its detailed historical documentation of volcanic eruptions. Tephra layers corresponding to historical eruptions were identified along the cores, thus allowing for accurate dating and determination of the sedimentation rate. The measurements performed in different cores from the same area showed that the sedimentation rate is uniform across the whole Gallipoli Terrace. We measured the oxygen isotope composition d18O of planktonic foraminifera. These measurements provided a high-resolution 2,200-year-long record. We sampled the core using a spacing of 2.5 mm corresponding to 3.87 years. Each sample of sediment (5 g) was soaked in 5% calgon solution overnight, then treated in 10% H2O2 to remove any residual organic material. Subsequently it was washed with a distilled-water jet through a sieve with a 150 µm mesh. The fraction > 150 µm was kept and oven-dried at 5°C. The planktonic foraminifera Globigerinoides ruber were picked out of the samples under a microscope. For each sample, 20-30 specimens were selected from the fraction comprised between 150 µm and 300 µm. The use of a relatively large number of specimens for each sample reduces the isotopic variability of individual organisms, giving a more representative d18O value. The stable isotope measurements were performed using a VG-PRISM mass spectrometer fitted with an automated ISO-CARB preparation device. Analytical precision based on internal standards was better than 0.1 per mil. Calibration of the mass spectrometer to VPDB scale was done using NBS19 and NBS18 carbonate standards. The strategic location of the drilling area makes this record a unique tool for climate and oceanographic studies of the Central Mediterranean.

The Hispanic American historical review.

Includes "Bibliographical section".

The Chicago massacre of 1812, with illustrations and historical documents,

Pages 219-224, publisher's advertisements.

Dave Owen, UM track, 1957, setting shot-put record at Michigan State, 58 ft. 10 in

[Dave Owen ., copy neg from MSU original]

Sprint Medley Relay Team 1979, UM Men's Track, Set world record of 3:22 at Michigan Relays in Lansing, braking record set by U-M team in 1976

{L-R: Charles Crouther, Andrew Bruce, Ken Gardner, Tim Thomas]

Sprint Medley Relay Team 1979, UM Men's Track, Set world record of 3:22 at Michigan Relays in Lansing, braking record set by U-M team in 1976

[L-R: Charles Crouther, Andrew Bruce, Ken Gardner, Tim Thomas]

An historical discourse, on the two hundredth anniversary of the founding of the Hopkins grammar school, New Haven, Connecticut. Delivered before the "Hopkins grammar school association", July 24th, 1860 / by Leonard Woolsey Bacon. With notes and an appendix. Pub. by request of the Association.

Mode of access: Internet.

An historical sketch of the College of New Jersey.

Mode of access: Internet.

Historical discourse at the one hundredth anniversary of the general convention of Congregational ministers and churches of Vermont, at Bennington, June 11, 1895 /

Mode of access: Internet.

Historical sketch of Mount Holyoke seminary. Founded at South Hadley, Mass., in 1837. Prepared in compliance with an invitation from the commissioner of education, representing the Department of the interior in matters relating to the national centennial of 1876.

Mode of access: Internet.

Urban transportation planning in the U.S.: an historical overview. Final report.

Mode of access: Internet.

Historical materials in the John Fitzgerald Kennedy Library /

Mode of access: Internet.

Archeological collections management at Minute Man National Historical Park, Massachusetts /

Includes bibliographies.