Volume 31, Number 4, Winter 1988/89
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38. Effect of Axial Magma Chambers Beneath Spreading Centers on the Compositions of Basaltic Rocks
38. EFFECT OF AXIAL MAGMA CHAMBERS BENEATH SPREADING CENTERS ON THE COMPOSITIONS OF BASALTIC ROCKS James H. Natland, Scripps Institution of Oceanography, La Jolla, California ABSTRACT Ferrobasalts are among a range of basalt types erupted over large, shallow, axial magma chambers beneath the East Pacific Rise crest near 9°N, and the Galapagos Rift near 86°W. Geological and geo- chemical evidence indicates that they evolve in small, isolated magma bodies either in conduit systems over the chambers, or in the solidify- ing walls of the magma chamber flanks away from the loci of fissure eruptions. The chambers act mainly as buffers in which efficient mix- ing ensures that a uniform average, moderately fractionated parent is supplied to the range of magma types erupted at the sea floor. For- mation of ferrobasalts in isolated magma bodies prevents them from mixing directly with primitive olivine tholeiite supplied to the base of the East Pacific Rise magma chamber at 9°N. Rises with abundant ferrobasalts may have magma chambers with broad, flat tops over which eruptions occur in wide, probably struc- turally unstable rift zones. Rises without ferrobasalts may have magma chambers with tapered tops which persistently constrain eruptions to narrow fissure zones, preventing formation of isolated shallow magma bodies where ferrobasalts can evolve. Formation of a flat-topped, rather than a tapered, magma chamber may reflect a high rate of magma supply relative to spreading rate. Steady-state compositions can be approached in magma cham- bers, probably approximating the least-fractionated typical lavas erupted above them. On this basis, the bulk magma composition in the chamber beneath the Galapagos Rift has become more iron-rich through time, a consequence of magma migration eastward down the rift as it shoaled to the west under the influence of the Galapagos Island hot spot. -
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SCIENTIFIC AMERICAN FRONTIERS PROGRAM #1503 "Going Deep" AIRDATE: February 2, 2005 ALAN ALDA Hello and welcome to Scientific American Frontiers. I'm Alan Alda. It's said that the oceans, which cover more than two thirds of the earth's surface, are less familiar to us than the surface of the moon. If you consider the volume of the oceans, it's actually more than ninety percent of the habitable part of the earth that we don't know too much about. The main reason for our relative ignorance is simply that the deep ocean is an absolutely forbidding environment. It's pitch dark, extremely cold and with pressures that are like having a 3,000-foot column of lead pressing down on every square inch -- which does sound pretty uncomfortable. In this program we're going to see how people finally made it to the ocean floor, and we'll find out about the scientific revolutions they brought back with them. We're going to go diving in the Alvin, the little submarine that did so much of the work. And we're going to glimpse the future, as Alvin's successor takes shape in a small seaside town on Cape Cod. That's coming up in tonight's episode, Going Deep. INTO THE DEEP ALAN ALDA (NARRATION) Woods Hole, Massachusetts. It's one of the picturesque seaside towns that draw the tourists to Cape Cod each year. But few seaside towns have what Woods Hole has. For 70 years it's been home to the Woods Hole Oceanographic Institution — an organization that does nothing but study the world's oceans. -
Dissolved and Particulate Organic Carbon in Hydrothermal Plumes from the East Pacific Rise, 91500N
Deep-Sea Research I 58 (2011) 922–931 Contents lists available at ScienceDirect Deep-Sea Research I journal homepage: www.elsevier.com/locate/dsri Dissolved and particulate organic carbon in hydrothermal plumes from the East Pacific Rise, 91500N Sarah A. Bennett a,n, Peter J. Statham a, Darryl R.H. Green b, Nadine Le Bris c, Jill M. McDermott d,1, Florencia Prado d, Olivier J. Rouxel e,f, Karen Von Damm d,2, Christopher R. German e a School of Ocean and Earth Science, National Oceanography Centre, Southampton SO14 3ZH, UK b National Environment Research Council, National Oceanography Centre, Southampton SO14 3ZH, UK c Universite´ Pierre et Marie Curie—Paris 6, CNRS UPMC FRE3350 LECOB, 66650 Banyuls-sur-mer, France d University of New Hampshire, Durham, NH 03824, USA e Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA f Universite´ Europe´enne de Bretagne, European Institute for Marine Studies IUEM, Technopoleˆ Brest-Iroise, 29280 Plouzane´, France article info abstract Article history: Chemoautotrophic production in seafloor hydrothermal systems has the potential to provide an Received 19 November 2010 important source of organic carbon that is exported to the surrounding deep-ocean. While hydro- Received in revised form thermal plumes may export carbon, entrained from chimney walls and biologically rich diffuse flow 23 June 2011 areas, away from sites of venting they also have the potential to provide an environment for in-situ Accepted 27 June 2011 carbon fixation. In this study, we have followed the fate of dissolved and particulate organic carbon Available online 3 July 2011 (DOC and POC) as it is dispersed through and settles beneath a hydrothermal plume system at 91500N Keywords: on the East Pacific Rise. -
'.L~:'I~' ,,:':;'.' ' ,:' Of.Prob1ems Concerning Wages, Hours, and Other Terms and Conditions of Elltploymejlt of the Employees of the Oi Ty of San Anselmo ' Ffi ("
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Shark Mitigation and Deterrent Measures Submission 64
The Efficacy and Regulation of Shark Mitigation and Deterrent Measures Submission to: Senate Environment and Communications References Committee by Peter Stephenson BSc., ADAS 2815.3, Master Class V February 2017 As a commercial diver and fisherman with over 35 years of diverse experience I write this submission due to my ever-increasing concerns about policies governing management of and research into shark populations. I began snorkelling at the age of 7 and was a keen spear fisherman and surfer for decades although I am currently no longer active in these sports. (partly due to increasing negative shark incidents) I have a BSc. In marine science from Flinders University and have completed a number of years of marine research. Over more than four decades I have spent tens of thousands of hours observing and studying the marine environment. In recent years, particularly after my friends Peter Clarkson and Greg Pickering were attacked by white sharks, I have been researching shark attacks, shark behaviour and the possible factors influencing negative shark/ human interactions. I have also witnessed aggressive shark behaviour first hand but have luckily escaped serious injury…. so far. I currently work as an abalone diver in the South Australian Central Zone Abalone Fishery. THIS IS A MAJOR WORKPLACE SAFETY ISSUE FOR ME! THE BAITING AND HARASSMENT OF SHARKS FOR TOURISM AND SCIENTIFIC RESEARCH Despite legislation deeming the berleying, baiting, approach and harassment of white sharks illegal, governments grant exemptions and licences to tourism operators and scientists to conduct these activities. Despite years of research and observation, the level of conditioning of sharks by repeated berleying and baiting is still poorly understood and documented. -
Exploration of the Deep Gulf of Mexico Slope Using DSV Alvin: Site Selection and Geologic Character
Exploration of the Deep Gulf of Mexico Slope Using DSV Alvin: Site Selection and Geologic Character Harry H. Roberts1, Chuck R. Fisher2, Jim M. Brooks3, Bernie Bernard3, Robert S. Carney4, Erik Cordes5, William Shedd6, Jesse Hunt, Jr.6, Samantha Joye7, Ian R. MacDonald8, 9 and Cheryl Morrison 1Coastal Studies Institute, Louisiana State University, Baton Rouge, Louisiana 70803 2Department of Biology, Penn State University, University Park, Pennsylvania 16802-5301 3TDI Brooks International, Inc., 1902 Pinon Dr., College Station, Texas 77845 4Department of Oceanography and Coastal Sciences, Louisiana State University, Baton Rouge, Louisiana 70803 5Department of Organismic and Evolutionary Biology, Harvard University, 16 Divinity Ave., Cambridge, Massachusetts 02138 6Minerals Management Service, Office of Resource Evaluation, New Orleans, Louisiana 70123-2394 7Department of Geology, University of Georgia, Athens, Georgia 30602 8Department of Physical and Environmental Sciences, Texas A&M – Corpus Christi, Corpus Christi, Texas 78412 9U.S. Geological Survey, 11649 Leetown Rd., Keameysville, West Virginia 25430 ABSTRACT The Gulf of Mexico is well known for its hydrocarbon seeps, associated chemosyn- thetic communities, and gas hydrates. However, most direct observations and samplings of seep sites have been concentrated above water depths of approximately 3000 ft (1000 m) because of the scarcity of deep diving manned submersibles. In the summer of 2006, Minerals Management Service (MMS) and National Oceanic and Atmospheric Admini- stration (NOAA) supported 24 days of DSV Alvin dives on the deep continental slope. Site selection for these dives was accomplished through surface reflectivity analysis of the MMS slope-wide 3D seismic database followed by a photo reconnaissance cruise. From 80 potential sites, 20 were studied by photo reconnaissance from which 10 sites were selected for Alvin dives. -
Graduate School of Oceanography
SUMMER 2018 THE UNIVERSITY OF RHODE ISLAND | GRADUATE SCHOOL OF OCEANOGRAPHY 14760_AGSO_Summer2018.indd 1 9/19/18 7:30 PM Aboard GSO SUMMER 2018 2 View Port The 2018 Volvo Ocean Race visits Newport 4 Happenings on the Waterfront A chronicle of events at GSO from January to June 2018 8 Cause & Effect Scientists investigate Rhode Island Sound and Narragansett Bay 10 Fisheries Program in the Philippines The Coastal Resources Center lands a historic grant 12 Dawn of a New Day The National Science Foundation awards its next Regional Class Research Vessel to GSO and the newly formed East Coast Oceanographic Consortium 16 The Future of Ocean Exploration Professor Ballard discusses ongoing research and core goals 19 Walking the Talk GSO alumna Leanna Heffner (Ph.D. 2013) 22 Make Fast Shore-side preparations and implemen- tation of the campus master plan 24 Alumni Support Growth in dollars raised and participation 24 Alumni News and Notes Right: On the drawing board and under construction is RCRV-2, the yet-to-be-named vessel that will call Narragansett, Rhode Island, home. She’ll arrive at GSO’s pier in 2021. Cover: “Endeavor at Dawn” by Alex DeCiccio. Aboard GSO is funded by alumni, friends and the Dean’s Office and is published twice yearly by the URI Graduate School of Oceanography. Please email your comments, questions, and/or news to [email protected] 14760_AGSO_Summer2018.indd 2 9/19/18 7:30 PM FROM THE DEAN “ Steady on course, full speed.” One of the rights of passage for geological cruises on the R/V Trident was to man the precision depth recorder as the ship carried out a mapping survey. -
Deep-Tow Studies of the Structure of the Mid-Atlantic Ridge Crest Near Lat 37°N
Deep-tow studies of the structure of the Mid-Atlantic Ridge crest near lat 37°N KEN C. MACDONALD* Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, La Jolla, California 92093 BRUCE P. LUYENDYK Department of Geological Sciences, University of California, Santa Barbara, California 93106 This article is one of a series appearing in the April and May issues of the Geological Society of America Bulletin on the scientific results of Project FAMOUS. These studies were undertaken in the axial area of the Mid-Atlantic Ridge between approximately 36°30' and 37°N latitudes. ABSTRACT large faulted blocks toward nearby fracture Le Pichon, 1974). We discuss here the de- zones suggests that spreading-center tec- tailed structure and evolution of the rift val- A detailed study of the structure of the tonics is affected by fracture-zone tectonics leys between fracture zones A and B (rift Mid-Atlantic Ridge median valley and rift throughout the length of the rift in the valley 2) and B and C (rift valley 3) and the mountains near lat 37°N (FAMOUS) was FAMOUS area. Both the crustal accretion rift mountains in these areas. Fine-scale conducted using a deep-tow instrument zone and transform fault zone are narrow, deep-tow studies of the inner floor of rift package. The median valley may have either only 1 to 2 km wide, over short periods of valley 2 are discussed by Luyendyk and a very narrow inner floor (1 to 4 km) and time. In the course of millions of years, how- Macdonald (1977). -
Geographical List of Public Sculpture-1
GEOGRAPHICAL LIST OF SELECTED PERMANENTLY DISPLAYED MAJOR WORKS BY DANIEL CHESTER FRENCH ♦ The following works have been included: Publicly accessible sculpture in parks, public gardens, squares, cemeteries Sculpture that is part of a building’s architecture, or is featured on the exterior of a building, or on the accessible grounds of a building State City Specific Location Title of Work Date CALIFORNIA San Francisco Golden Gate Park, Intersection of John F. THOMAS STARR KING, bronze statue 1888-92 Kennedy and Music Concourse Drives DC Washington Gallaudet College, Kendall Green THOMAS GALLAUDET MEMORIAL; bronze 1885-89 group DC Washington President’s Park, (“The Ellipse”), Executive *FRANCIS DAVIS MILLET AND MAJOR 1912-13 Avenue and Ellipse Drive, at northwest ARCHIBALD BUTT MEMORIAL, marble junction fountain reliefs DC Washington Dupont Circle *ADMIRAL SAMUEL FRANCIS DUPONT 1917-21 MEMORIAL (SEA, WIND and SKY), marble fountain reliefs DC Washington Lincoln Memorial, Lincoln Memorial Circle *ABRAHAM LINCOLN, marble statue 1911-22 NW DC Washington President’s Park South *FIRST DIVISION MEMORIAL (VICTORY), 1921-24 bronze statue GEORGIA Atlanta Norfolk Southern Corporation Plaza, 1200 *SAMUEL SPENCER, bronze statue 1909-10 Peachtree Street NE GEORGIA Savannah Chippewa Square GOVERNOR JAMES EDWARD 1907-10 OGLETHORPE, bronze statue ILLINOIS Chicago Garfield Park Conservatory INDIAN CORN (WOMAN AND BULL), bronze 1893? group !1 State City Specific Location Title of Work Date ILLINOIS Chicago Washington Park, 51st Street and Dr. GENERAL GEORGE WASHINGTON, bronze 1903-04 Martin Luther King Jr. Drive, equestrian replica ILLINOIS Chicago Jackson Park THE REPUBLIC, gilded bronze statue 1915-18 ILLINOIS Chicago East Erie Street Victory (First Division Memorial); bronze 1921-24 reproduction ILLINOIS Danville In front of Federal Courthouse on Vermilion DANVILLE, ILLINOIS FOUNTAIN, by Paul 1913-15 Street Manship designed by D.C. -
1969 Compassion and Care
Justice Holmes • Inflammation • Harry Widener MAY-JUNE 2019 • $4.95 Compassion 1969 and Care Physician-Poet Rafael Campo Reprinted from Harvard Magazine. For more information, contact Harvard Magazine, Inc. at 617-495-5746 May 2019 Dear Reader, In 1898, an association of Harvard graduates established the Harvard Alumni Bulletin, “to give selected and summarized Harvard news to graduates who want it” and “to serve as a medium for publishing promptly all notices and announcements of interest to graduates.” members and students extend the limits of discovery and human understanding—in service to an ever more far- ung, diverse group of alumni around the globe. Today, nearly a century and a quarter later, the name has changed, to Harvard Magazine (as have the look and contents), but the founding Your Harvard Magazine can capture alumni voices (see the letters responding to the March-April principles have not: feature on the events of April 1969, beginning on page 4 of this issue), dive deep into critical research (read the feature on the scientists exploring in ammation, and how their work contributes • e magazine exists to serve the interests of its readers (now including all University to understanding disease, on page 46), and keep you current on the critical issues facing higher alumni, faculty, and sta )—not any other agenda. education on campus and around the world (see John Harvard’s Journal, beginning on page 18). • Readers’ support is the most important underpinning of this commitment to high- Your contribution underwrites the journalism you are reading now, the expanded coverage quality, editorially independent journalism on readers’ behalf. -
Biomechanics of Safe Ascents Workshop
PROCEEDINGS OF BIOMECHANICS OF SAFE ASCENTS WORKSHOP — 10 ft E 30 ft TIME AMERICAN ACADEMY OF UNDERWATER SCIENCES September 25 - 27, 1989 Woods Hole, Massachusetts Proceedings of the AAUS Biomechanics of Safe Ascents Workshop Michael A. Lang and Glen H. Egstrom, (Editors) Copyright © 1990 by AMERICAN ACADEMY OF UNDERWATER SCIENCES 947 Newhall Street Costa Mesa, CA 92627 All Rights Reserved No part of this book may be reproduced in any form by photostat, microfilm, or any other means, without written permission from the publishers Copies of these Proceedings can be purchased from AAUS at the above address This workshop was sponsored in part by the National Oceanic and Atmospheric Administration (NOAA), Department of Commerce, under grant number 40AANR902932, through the Office of Undersea Research, and in part by the Diving Equipment Manufacturers Association (DEMA), and in part by the American Academy of Underwater Sciences (AAUS). The U.S. Government is authorized to produce and distribute reprints for governmental purposes notwithstanding the copyright notation that appears above. Opinions presented at the Workshop and in the Proceedings are those of the contributors, and do not necessarily reflect those of the American Academy of Underwater Sciences PROCEEDINGS OF THE AMERICAN ACADEMY OF UNDERWATER SCIENCES BIOMECHANICS OF SAFE ASCENTS WORKSHOP WHOI/MBL Woods Hole, Massachusetts September 25 - 27, 1989 MICHAEL A. LANG GLEN H. EGSTROM Editors American Academy of Underwater Sciences 947 Newhall Street, Costa Mesa, California 92627 U.S.A. An American Academy of Underwater Sciences Diving Safety Publication AAUSDSP-BSA-01-90 CONTENTS Preface i About AAUS ii Executive Summary iii Acknowledgments v Session 1: Introductory Session Welcoming address - Michael A. -
NATIONAL OCEANOGRAPHIC LABORATORY SYSTEM %Vas
UNIVERSITY - NATIONAL OCEANOGRAPHIC LABORATORY SYSTEM ALVIN REVIEW COMMITTEE Summary Report of the June 26, 27, 1991 Meeting Carriage House Woods Hole Oceanographic Institution Woods Hole, MA Minutes of the Meeting APPENDICES I. ALVIN Review Committee Roster II. Agenda III. Report on ALVIN Operations, 1990-1991 IV. Letter on Archiving Policy for ALVIN data and records V. 1991 Dive Requests by Region VI. Summary of 1992 Dive Requests VII. Opportunities for Oceanographic Research, DSV ALVIN, 1992 VIII. Rules for Review of ALVIN Dive Requests it as 111K . "? • %Vas- IILALtr CE D AUG 1 . ) 1991 I 1 UNOLS OFFICE ALVIN Review Committee Minutes of Meeting June 26, 27, 1991 Carriage House Woods Hole Oceanographic Institution Woods Hole, MA OPENING THE MEETING The meeting was called at 8:00 a.m. by Feenan Jennings, ARC Chair. Committee members, funding agency representatives from NOAA, NSF and ONR, WHOI personnel and UNOLS Office staff present for all or part of the meeting: ALVIN Review Committee Agency Representatives Feenan Jennings, Chair David Duane, NOAA Casey Moore Don Heinrichs, NSF Doug Nelson Keith Kaulum, ONR Mary Scranton Gary Taghon Karen Von Damm Dick Pittenger, WHOI member WHOI UNOLS Office Craig Dorman Bill Barbee Barrie Walden Jack Bash Don Moller Annette DiSilva Rick Chandler Mary D'Andrea The ALVIN Review Committee Roster is Appendix I. Craig Dorman, Director, WHOI, welcomed the ALVIN Review Committee and introduced Dick Pittenger, whom he had earlier named as the WHOI (operating institution ex-officio) member on the ARC. Dr. Dorman reiterated WHOI's strong commitment to continue to manage and operate ALVIN in support of the United States' oceanographic program.