Peter Valley
U.S. Geological Survey, Reston, VA
Activity
2025
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PRELIMINARY RESULTS FROM BEDROCK MAPPING IN THE SPECKLED MOUNTAIN QUADRANGLE, MAINE
42 Mapping in the Geosciences: Processes and ProductsSunday, 30 March 20258:30 AM - 2:30 PMNorth Great Hall
2024
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BEDROCK GEOLOGIC MAP OF THE PORT HENRY QUADRANGLE, ESSEX COUNTY, NEW YORK AND ADDISON COUNTY, VERMONT
24 Mapping in the Geosciences: Processes and Products (Posters)Monday, 18 March 20249:00 AM - 1:00 PMArmory Ballroom
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GEOCHEMICAL AND TECTONIC EVOLUTION OF THE ORDOVICIAN BRONSON HILL ARC AND SILURIAN AND DEVONIAN CONNECTICUT VALLEY TROUGH: EASTERN VERMONT AND WESTERN NEW HAMPSHIRE, USA
19 Unraveling Appalachian Orogenic Events Using Geological and Geophysical MethodsMonday, 18 March 20248:00 AM - 12:00 PMMerrimack Room
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PRELIMINARY BEDROCK GEOLOGIC MAP OF NEW ENGLAND, USA
24 Mapping in the Geosciences: Processes and Products (Posters)Monday, 18 March 20249:00 AM - 1:00 PMArmory Ballroom
2023
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A LITHOSTRATIGRAPHIC, BIOSTRATIGRAPHIC, AND PETROGRAPHIC ANALYSIS OF MIDDLE AND UPPER ORDOVICIAN STRATA IN THE SOUTHERN CHAMPLAIN VALLEY, NEW YORK, AND A PRELIMINARY 1:24,000 SCALE GEOLOGIC MAP OF THE PORT HENRY QUADRANGLE
37 Mapping in the Geosciences: Processes and Products (Posters)Saturday, 18 March 20231:30 PM - 5:30 PMGrand Ballroom A–D
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NEOPROTEROZOIC DIKES OF THE NORTHEASTERN ADIRONDACK MOUNTAINS
12 The Grenville Orogen in Eastern North AmericaFriday, 17 March 20231:30 PM - 5:30 PMRegency Ballroom A
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BEDROCK GEOLOGIC MAPPING IN THE ADIRONDACK HIGHLANDS, NEW YORK
12 The Grenville Orogen in Eastern North AmericaFriday, 17 March 20231:30 PM - 5:30 PMRegency Ballroom A
2022
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RELATIVE TIMING AND METAMORPHISM OF LATE-STAGE, TRANSTENSIONAL SHEAR ZONES IN THE EASTERN ADIRONDACK HIGHLANDS
32 Tectono-Metamorphic Processes at Convergent Boundaries: Insights from the Grenville Orogen, Northeastern North America, and BeyondMonday, 21 March 20221:30 PM - 5:30 PMCommonwealth Salon 4
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NEW BEDROCK GEOLOGIC MAPPING IN THE ADIRONDACK HIGHLANDS, NORTHERN NEW YORK
32 Tectono-Metamorphic Processes at Convergent Boundaries: Insights from the Grenville Orogen, Northeastern North America, and BeyondMonday, 21 March 20221:30 PM - 5:30 PMCommonwealth Salon 4
2020
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PRELIMINARY MAPPING RESULTS FROM THE PORT HENRY QUADRANGLE, ADIRONDACK MOUNTAINS, NEW YORK
T71 Some like It HOT: The Role of Late Extensional Tectonics in Collisional Orogens, with Special Emphasis on the Grenville OrogenTuesday, 27 October 20201:30 PM - 5:30 PMMeeting Rooms
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TECTONIC IMPLICATION OF NEW U-PB ZIRCON AGES IN THE BRONSON HILL ARC: WESTERN NEW HAMPSHIRE, USA
43 Appalachian Petrology: A Session to Honor the Career of Dr. Robert J. TracySaturday, 21 March 20201:30 PM - 5:30 PMLake Fairfax
2018
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AN INVESTIGATION INTO THE CORRELATION BETWEEN NA-METASOMATISM AND ECONOMIC DEPOSTIS IN THE ADIRONDACK MOUNTAINS, NY
55 The Adirondack Mountains and the Grenville Orogenic Cycle: New Results and Syntheses Regarding the Timing and Nature of Deformation, Metamorphism, Intrusion, and Formation of Ore Deposits: A Session Honoring the Work of Bruce Selleck (Posters)Tuesday, 20 March 20188:00 AM - 12:00 PMLake Champlain Exhibition Hall
2017
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TECTONIC EVOLUTION OF THE CONNECTICUT VALLEY REGION IN SOUTH-CENTRAL VERMONT AND WEST-CENTRAL NEW HAMPSHIRE
43 NETectonics: New Advances in Structural Geology and Tectonics in the AppalachiansMonday, 20 March 20171:30 PM - 5:30 PMLawrence Welk Room, Mezzanine Level
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ALLEGHANIAN DEFORMATION AND RECRYSTALLIZATION IN THE CONNECTICUT VALLEY OF VT AND NH
30 NETectonics: New Advances in Petrology, Geochemistry and Geochronology in the AppalachiansMonday, 20 March 20178:00 AM - 12:00 PMLawrence Welk Room, Mezzanine Level
2016
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TEXTURAL AND U-PB ZIRCON SHRIMP-RG GEOCHRONOLOGY EVIDENCE IN SUPPORT OF A C. 1060-1040 MA MAGMATIC CRYSTALLIZATION AGE FOR THE SKIFF MOUNTAIN BODY OF THE LYON MOUNTAIN GRANITE, EAST-CENTRAL ADIRONDACK HIGHLANDS, GRENVILLE PROVINCE
208 Intrusion, Accretion, Exhumation, and Collapse: Tectonics around the WorldTuesday, 27 September 20161:30 PM - 5:30 PMMile High Ballroom 2B
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LOW-TI MAGNETITE DEPOSITS OF THE LYON MOUNTAIN GRANITE, ADIRONDACK MOUNTAINS, NEW YORK: AN OVERVIEW
31 The Grenville-Age Low Ti-Fe Oxide Deposits from New York State: Igneous or Hydrothermal?Tuesday, 22 March 20168:00 AM - 12:00 PMMeeting Room 3
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MULTIPLE STAGES OF MINERALIZATION OF THE HAMMONDVILLE MAGNETITE-APATITE DEPOSITS
31 The Grenville-Age Low Ti-Fe Oxide Deposits from New York State: Igneous or Hydrothermal?Tuesday, 22 March 20168:00 AM - 12:00 PMMeeting Room 3
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IMPLICATIONS FOR THE PRESERVATION OF MAGMATIC TEXTURES IN THE LYON MOUNTAIN GRANITE, ADIRONDACK MOUNTAINS, NEW YORK
14 Timing and Nature of Deformation in the Adirondack Mountains IIMonday, 21 March 20161:30 PM - 5:30 PMMeeting Room 6
2015
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STRUCTURAL EVOLUTION OF THE EASTERN ADIRONDACK HIGHLANDS, SOUTHERN GRENVILLE PROVINCE
5 Structural Geology: Geometry and Kinematics from Mapping and ModelingSunday, 1 November 20158:00 AM - 12:00 PMRoom 336
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DISPLACEMENT HISTORY OF THE GRANTHAM FAULT IN SOUTHWEST NEW HAMPSHIRE CONSTRAINED BY APATITE FISSION-TRACK AGES
39 Contributions to New England Stratigraphy & Structure: In Honor of Robert Moench and Douglas Rankin (Posters)Tuesday, 24 March 20158:00 AM - 12:00 PMPresidential Ballroom
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NEW U-PB ZIRCON AGES FROM THE BRONSON HILL ARC, WEST-CENTRAL NEW HAMPSHIRE
1 Contributions to New England Stratigraphy & Structure I: In Honor of Robert Moench and Douglas RankinMonday, 23 March 20158:00 AM - 12:00 PMGrand Ballroom South
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40AR/39AR CONSTRAINTS ON THE PALEOZOIC COOLING HISTORY OF SOUTHWEST NEW HAMPSHIRE AND ADJACENT VERMONT
1 Contributions to New England Stratigraphy & Structure I: In Honor of Robert Moench and Douglas RankinMonday, 23 March 20158:00 AM - 12:00 PMGrand Ballroom South
2014
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TECTONIC HISTORY OF THE BRONSON HILL ANTICLINORIUM IN THE CONNECTICUT RIVER VALLEY, WESTERN NEW HAMPSHIRE AND EASTERN VERMONT
T7 Geology and Hydrology of the National Parks: Research, Mapping, and Resource Management ISunday, 19 October 20148:00 AM - 12:00 PM214
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AN EARLY TRIASSIC DUCTILE SHEAR ZONE NEAR CLAREMONT, NH: EVIDENCE FROM 40AR/39AR DATING OF WHITE MICA
49 Implementing Recent Innovations in Thermobarometry to Constrain Igneous and Metamorphic EvolutionMonday, 24 March 20143:45 PM - 5:35 PMCommonwealth Salons 1-2
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TECTONIC EVOLUTION AND EXHUMATION OF THE LOWER STRUCTURAL LEVELS OF THE BRONSON HILL ANTICLINORIUM IN SOUTHWESTERN NEW HAMPSHIRE AND ADJACENT VERMONT
51 Echoes of Exhumation: Comparing Exhumation Processes of the Ancient Appalachians to Those of Currently Active OrogensMonday, 24 March 20141:30 PM - 5:50 PMHeritage Salon D
2013
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40AR/39AR DATING OF A LOWER-GREENSCHIST FACIES SHEAR ZONE: PERMIAN DEFORMATION IN WESTERN NEW HAMPSHIRE
T404 Through the Looking Glass: Microstructural Insights into Tectonic ProcessesWednesday, 30 October 20131:00 PM - 5:00 PMRoom 507
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MAGNETITE-APATITE DEPOSITS IN THE ADIRONDACK MOUNTAINS, NEW YORK: A SOURCE FOR RARE EARTH ELEMENTS?
18 Past, Present and Future Mining in the Northeast USA and Adjacent CanadaMonday, 18 March 20131:30 PM - 2:40 PMGifford Room
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DEFORMATION HISTORY AND EMPLACEMENT OF THE CROYDON DOME, SOUTHWESTERN NEW HAMPSHIRE
25 Structural Geology/Tectonics (Posters)Monday, 18 March 20131:30 PM - 5:00 PMGrand Ballroom South
2012
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HOW DOES NEW HAMPSHIRE ATTACH TO VERMONT? NEW INFORMATION ON A LONG-STANDING PROBLEM IN WESTERN NEW HAMPSHIRE
34 Future Directions in Appalachian Tectonics: Building on Recent Lithotectonic Syntheses IIMonday, 19 March 20121:30 PM - 5:30 PMCapital Rooms 2 & 3
2009
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USING HF ISOTOPES IN ZIRCON TO MONITOR FLUID PROCESSES AND IRON OXIDE-APATITE MINERALIZATION AND REMOBILIZATION DURING OROGENIC EXTENSION
T157 Geofluids and Deformation: Integrated Studies for the 21st CenturyTuesday, 20 October 20098:00 AM - 12:00 PMA105
2008
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Direct Dating of Low-Ti Magnetite Deposits in the Lyon Mountain Gneiss by U/Pb Zircon Geochronology
T185 Recent Advances in the Understanding of Adirondack and Southern Grenville Province Tectonics I: In Honor of James McLellandMonday, 6 October 20088:00 AM - 12:00 PM
2007
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IDENTIFYING THE SEQUENCE OF MULTIPLE FLUID EVENTS IN METAMORPHIC TERRANES: AN EXAMPLE FROM THE LYON MOUNTAIN GNEISS, ADIRONDACK MOUNTAINS, NEW YORK
T226 Diversity in Crustal Fluid Compositions: Geological Origins and ConsequencesWednesday, 31 October 20071:30 PM - 5:30 PM