Imagine ‘Speed Dating’ to Fund Research

The White Mountains, immediately east of the central Sierra Nevada in California and Nevada have one of the most complete sequences of deposits from glacial events in North America. New pre- and post-applications of new surface exposure dating methods make it possible to determine ages of geomorphic surfaces through analyses of multiple cosmogenic isotopes that accumulate in surface boulders. The goal of this collaborative project is to develop a numerical glacial chronology for the White Mountains using these surface-exposure dating methods in conjunction with dates based on associated volcanics, rock varnish, soils, and weathering. The investigators will use the same approach in the Sierra Nevada in order to an accurately compare the two records and to discriminate the effects of synoptic climatology versus tectonic history as controls on the glaciation of the mountain ranges. The research is anticipated to provide one of the most complete continental records of glacial events in North America. The results obtained also will provide a chronology for comparing a continental glacial record with other long-term records of continental and environmental change and with the well-established marine record.

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Although food product dating regulations vary by country, dates are commonly found on many food items sold in Europe, the U.S. and Canada, especially on.

To support our nonprofit science journalism, please make a tax-deductible gift today. Geochronologists have tried to pinpoint the age of the million-year-old Deccan Traps, massive lava flows in India that may have helped wipe out the dinosaurs. But for too long, the arbiters of these stories—the geochronologists who date the age of rocks—have been underfunded and uncoordinated. It could also calibrate, standardize, and improve the efficiency of different methods, which are based on the radioactive decay of elements within a rock.

The consortium could help geochronology emerge from a deep slump, says Mark Harrison, a geochemist at the University of California UC , Los Angeles, who led a proposal cited in the new report. Ever since the U. The geochronology funding could also help iron out discrepancies between labs and dating systems, says Dennis Kent, a paleogeographer at Rutgers University, New Brunswick, and study co-author. Researchers want an anvil, similar to ones in Europe and Asia, that can work on larger, multimillimeter-size samples so they can perform a wider variety of measurements.

Finally, the agency should create a Near-Surface Geophysics Center, the report recommends. Many emerging tools, such as using nuclear magnetic resonance to study ground porosity, show potential but need further development. It did, however, recommend the continued development of several ambitious proposals that would require significant new investment from NSF, beyond the reach of the EAR budget.

One is the SZ4D initiative, which would study one or several subduction zones , where oceanic crust dives beneath continents, and cost hundreds of millions of dollars.

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NSF-funded technique may eventually allow scientists to better understand cycles of ice ages. This material is available primarily for archival purposes. Telephone numbers or other contact information may be out of date; please see current contact information at media contacts. A team of scientists, funded by the National Science Foundation NSF , has successfully used a new technique to confirm the age of a ,year-old sample of Antarctic ice.

The new dating system is expected to allow scientists to identify ice that is much older, thereby reconstructing climate much farther back into Earth’s history and potentially leading to an understanding of the mechanisms that cause the planet to shift into and out of ice ages. The new technique provides an accurate means of confirming the age of ice samples, and researchers note it is now the most precise dating tool for ancient ice.

Collaborative Research: Dating Deformation with Titanite the geologic history of the Earth comes from radiometric dating of Earth processes.

Taylor and his colleagues will conduct exploratory research to determine the feasibility of using osteocalcin to radiocarbon date bone. The project consists of three parts. First osteocalcin will be extracted from sample bone and its purity determined through analysis of amounts of Gla and Hyp present. Secondly osteocalcin will be extracted from bone with known age of greater than , years and then radiocarbon dated. One would expect that radioactive activity would not exceed background levels.

Finally osteocalcin will be extracted from degraded bone which derives from Clovis age sites ca. This also will be radiocarbon dated and the accuracy of the results determined. Most of the organic fraction of bone consists of collagen and many experiments have shown that if this collagen is not seriously degraded by post depositional processes it can yield accurate radiocarbon ages.

However it is also clear that degraded collagen often given anomalous results. Osteocalcin is a non- collagen organic material which is also present in bone and preliminary results lead Taylor and his colleagues to believe that it may provide accurate dates for degraded bone. This preliminary exploratory project will serve to evaluate this approach and hopefully provide the basis for more large scale work. This research is important not only for archaeologists but other scientists who wish to date the past.

Bone is often the only organic material preserved in archaeological sites and other prehistoric contexts.

NSF pushed to boost funding for dating and squeezing rocks

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New research, however, has demonstrated that Chavin’s architectural sequence is much different and more complex than previously believed, and that its monumental construction concluded between – B. This represents a major shift in Chavin chronology that significantly impacts understanding of Andean formative social development. Chavin’s few dates are now associated with the final monumental stage and later periods of the site’s long construction sequence.

Consequently, the time depth represented by the undated, complex monumental stages prior to this suggests that the sequence extends much farther back in time than previously believed. This increased time-depth would dramatically change archaeologist’s understanding of the Andean formative period. Additionally, many other formative sites are sparsely dated, making inter-site comparisons problematic.

Love at First Site: Professor Stephanie Tong Receives 3-Year NSF Grant for Online Dating Studies

Ask any girl, and they will tell you that dating an NSF recruit can be a total nightmare most of the time. Ask any guy who is about to enlist, they will tell you all the horror stories of girls breaking up with guys when they enlist. I mean come on la, these poor things are forced to serve the nation for 2 years, the least you could do is to be there for them right?

JOBS AGENDA, COBURN AIMS AT NSF STUDY ON DATING-SITE what he says is wasteful spending at the National Science Foundation.

Arctic where the same site was occupied by multiple groups of people over time. This occupational history makes it easier to understand how past residents used the site and how those uses changed through time. The first excavation of Walakpa took place in , but much of the site remained unexplored. A few years ago, Walakpa began eroding into the sea due to rapid Arctic change, and urgent work to save the data began, resulting in data from two different excavations that need to be reconciled.

This project identifies artifacts and samples from recent excavations for radiocarbon dating and chronological modeling to understand the dates of these archaeological layers with better accuracy and precision, allowing archaeologists to link archaeological layers identified in with the more recent rescue excavations, allowing for a more complete picture of the archaeology of Walakpa.

New radiocarbon samples will be taken from well-provenienced samples from known Birnirk AD cultural levels and will be submitted for Accelerator Mass Spectrometry AMS radiocarbon dating and isotopic analysis. Bayesian chronological modeling of the Walakpa site radiocarbon data will be applied to produce realistic estimates for the dates of the site’s Birnirk presence.

This work will help establish a better regional chronology for Birnirk and the transition to the subsequent Thule AD period on the North Slope of Alaska. The project will also ensure the proper packaging, shipment, and curation of materials at the Museum of the North at the University of Alaska Fairbanks, ensuring the samples are available for future generations of archaeologists. The results will allow researchers to study the artifacts from both excavations together and guide future archaeological research on the North Slope.

Information and examples of change documented through this project, from a site that was occupied for such a long time through many changes, when combined with information from other similar sites, will provide a more robust picture of ancient settlement on the North Slope. This award reflects NSF’s statutory mission and has been deemed worthy of support through evaluation using the Foundation’s intellectual merit and broader impacts review criteria.

Please report errors in award information by writing to: awardsearch nsf.

Love at First Site? Wayne State Receives NSF Grant to Explore Impact of Online Dating

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NSF’s mission is to advance the progress of science, a mission accomplished by funding proposals for research and education made by.

This technique is important to archaeologists and other scientists because it permits extremely small samples to be measured. Long’s laboratory is responsible for preparing samples for both the TAMS and conventional beta counting machines. With an additional three years of support, this laboratory will both continue its own research and provide a service function to the user community. It will pursue a series of specialized research projects.

The laboratory has developed techniques for extracting and purifying organic components from bone. Such samples have been shown to give reliable TAMS dates. This focus on bone work will continue. Emphasis will also be placed on dating early cultigens from North America to elucidate the prehistoric development of agriculture. Dating is crucial in archaeological research, and the development of TAMS technique has provided a major breakthrough because of relaxed sample size requirements.

Many new questions could be addressed and many have been answered because of the Arizona work. In the process it has become clear that a major problem lies in sample preparation; dates can be no better than the samples placed in the machine. Long’s laboratory has made and continues to make major strides in this area. This project is important because it provides a basic and necessary service not only to archaeologists but also to scientists working in a wide range of disciplines.

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