George Lozefski
- Research Staff Assistant -My job: I work in the Core Repository opening, photographing, and describing cores. Cores of deep-sea sediments are brought to the repository in plastic core liners (cylinders) that are split open and then digitally photographed for archiving the color, texture and sedimentary structures of the sediments (see images below). The cores are then sampled and the sediments are described and analyzed for composition (megascopic and petrographic characteristics for mineralogy and paleontology), and sieved (coarse and fine fractions of sediments separated for grain size analysis). I also do analyses on cores (trained by the extremely skilled and patient Nichole) using a Multi-sensor Core Logger (for Imaging, Density, Magnetic Susceptibility and RGB Data), develop X-Ray Radiographs of sediment cores, For grain size analyses we use a Sedigraph (fine fraction <63μm cumulative percentages) and a Sonic Sifter (coarse fraction >63μm cumulative percentages). All analyses and photographs are archived and utilize computer software and applications for processing the data and making it available to the international scientific community (see our website).
I also sample the cores for researchers from across the United States and around the world if they cannot come to Lamont themselves. We have deep-sea sediments from every ocean on earth, which preserve the geologic, and paleoclimatic history of our planet from hundreds to millions of years and contain invaluable information for research scientists and educators. The history of Lamont itself and its contributions to science for over 50 years is just as dynamic and exciting (check out the Lamont home website). So many great discoveries in Oceanography and Geophysics happened here first and I am very fortunate indeed to be a part of the Lamont community.
I came here during my last semester at Queens College, City University of New York where I focused on sedimentology, mineralogy and paleontology. I am currently working on my MA in Geology (heavy minerals and paleoseismology) with Cecilia McHugh, adjunct associate research scientist at Lamont (marine geology and sedimentology) and professor at Queens College. I have been on two cruises so far, one off the coast of New Jersey collecting cores around the Hudson and Thompson Canyons of the New Jersey continental margin and a cruise collecting cores up the Hudson River form Alpine to Newburgh.
Check out the images below to see what I do here and other fun stuff!
I also sample the cores for researchers from across the United States and around the world if they cannot come to Lamont themselves. We have deep-sea sediments from every ocean on earth, which preserve the geologic, and paleoclimatic history of our planet from hundreds to millions of years and contain invaluable information for research scientists and educators. The history of Lamont itself and its contributions to science for over 50 years is just as dynamic and exciting (check out the Lamont home website). So many great discoveries in Oceanography and Geophysics happened here first and I am very fortunate indeed to be a part of the Lamont community.
I came here during my last semester at Queens College, City University of New York where I focused on sedimentology, mineralogy and paleontology. I am currently working on my MA in Geology (heavy minerals and paleoseismology) with Cecilia McHugh, adjunct associate research scientist at Lamont (marine geology and sedimentology) and professor at Queens College. I have been on two cruises so far, one off the coast of New Jersey collecting cores around the Hudson and Thompson Canyons of the New Jersey continental margin and a cruise collecting cores up the Hudson River form Alpine to Newburgh.
Check out the images below to see what I do here and other fun stuff!
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Removing excess pipe from a sediment core before splitting. To find out what this all means check out what cores are and about working on cores 
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After mechanical splitting, the core is scored by hand for a clean cut. A thin musical wire (note red arrow) is then guided down the scored pipe for the final split. 
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Work on the cores requires precision measuring. 
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For more information, contact Rusty Lotti Bond (curator "at" ldeo.columbia.edu). Comments are welcomed. Last update of this page was January 12, 2004.