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Full-Text Articles in Geology

A Bacteriological And Chemical Analysis Of Nonpoint Source Pollution In A Karst Aquifer Bowling Green, Kentucky, Wayne Green May 1984

A Bacteriological And Chemical Analysis Of Nonpoint Source Pollution In A Karst Aquifer Bowling Green, Kentucky, Wayne Green

Masters Theses & Specialist Projects

Monthly water samples collected from four sites in the Lost River Groundwater Basin, a shallow karst aquifer in the Bowling Green-Warren County area of Kentucky, represented samples from sites receiving conduit and diffuse flow. All sites were severely contaminated with bacteria, and on some occasions the surface water criteria for some heavy metals were exceeded.

Of the total 334 bacterial colonies identified 92.1% were verified as Escherichia coli by the API20E system. Acinetobacter calcoaceticus var. anitratum accounted for 2.10% of colonies; Citrobacter freundii for 0.30% Klebsiella pneumoniae for 0.90%; Klebsiella oxytoca, 0.90%; Citrobacter amalonaticus 0.30%; Enterobacter cloacae, 1.20%; …


Peat Resources Of Maine - Volume 4: Southern And Western Maine, Cornelia C. Cameron, Michael K. Mullen, Carolyn A. Lepage Jan 1984

Peat Resources Of Maine - Volume 4: Southern And Western Maine, Cornelia C. Cameron, Michael K. Mullen, Carolyn A. Lepage

Maine Collection

Peat Resources of Maine - Volume 4: Southern and Western Maine

by Cornelia C. Cameron, Michael K. Mullen, Carolyn A. Lepage & Walter A. Anderson

Bulletin 31 - Maine Geological Survey, Department of Conservation, Augusta, Maine (1984).

Preparation of this report was supported by funds furnished by the U.S. Department of Energy, Grant No. DE-FG18-79ET14690, the Maine Office of Energy Resources, the Maine Geological Survey, and the U.S. Geological Survey.

Contents: Introduction / The Maine Peat Resource Evaluation Program / Geologic Setting of Maine Peat Deposits / Formation of Peat Deposits in Maine / Methods of Investigation / Identification of …


Trace-Elements In Ilmenite - A Way To Discriminate Provenance Or Age In Coastal Sands, Dennis A. Darby Jan 1984

Trace-Elements In Ilmenite - A Way To Discriminate Provenance Or Age In Coastal Sands, Dennis A. Darby

OES Faculty Publications

Trace elements and Ti percentage in ilmenite grains magnetically separated from modern and late Pleistocene coastal sands of southeastern Virginia and northwestern North Carolina were used to distinguish different deposits. Multivariate analysis of ilmenite composition (Ti, Mn, Mg, Cr, V, Ni, and Cu) from coastal deposits and potential source rivers enabled the identification of dominant source rivers. Using the trace element content of one mineral instead of heavy-mineral suites eliminated most of the hydraulic sorting, selective weathering, and intrastratal solution problems that often obscure heavy-mineral provenance determinations. Most ilmenite grains lacked exsolution or twinning, which are common to ilmenite; however, …


Hydrochemical Data For The Truckee River Drainage System, California And Nevada, Larry V. Benson Jan 1984

Hydrochemical Data For The Truckee River Drainage System, California And Nevada, Larry V. Benson

United States Geological Survey: Staff Publications


Abstract

Surface-water samples were collected from the Truckee River drainage system during 1975, 1976, and 1981. Data resulting from chemical analyses of these samples, as well as certain other previously unpublished data, are tabulated in this report. The report contains the following hydrochemical data:

1. Chemical composition of 21 tributaries to Lake Tahoe and the Truckee River upstream from Farad, California (May and October 1971, and June 1972).

2. Chemical composition of the Truckee River at Tahoe City (January 1968-January 1975) and at Farad, California (January 1968-June 1980), and of the Little Truckee River upstream from Stampede Reservoir, California (January …


Diagenesis Of Miocene Biogenic Sediments In Lost Hills Oil Field, San Joaquin Basin, California, Michael A. Kruge Jan 1983

Diagenesis Of Miocene Biogenic Sediments In Lost Hills Oil Field, San Joaquin Basin, California, Michael A. Kruge

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

Major portions of the Miocene Monterey formation of California were deposited under low oxygen conditions, with restricted clastic influx, beneath waters with high phytoplankton productivity. The resulting diatomaceous and organic-rich sediments underwent diagenetic modification as they were buried.

A suite of core samples was collected from eight wells in the Lost Hills oil field ranging in present depth of burial between 535 and 2285 meters. In one well, the entire Monterey section was sampled. Cores taken from the remaining wells sampled the Reef Ridge and Antelope Members of the Monterey Formation at various burial depths.

Silica mineralogy was studied using …


Chemical Composition Of Ground Water And The Locations Of Permeable Zones In The Yucca Mountain Area, Nevada, Larry Benson, J. H. Robison, R. K. Blankennagel, A. E. Ogard Jan 1983

Chemical Composition Of Ground Water And The Locations Of Permeable Zones In The Yucca Mountain Area, Nevada, Larry Benson, J. H. Robison, R. K. Blankennagel, A. E. Ogard

United States Geological Survey: Publications

Ten wells in the Yucca Mountain area of southern Nevada have been sampled for chemical analysis. Samples were obtained during pumping of water from the entire well bore (composite sample) and in one instance by pumping water from a single isolated interval in well UE-25b#1. Sodium is the most abundant cation and bicarbonate the most abundant anion in all water samples. Although the general chemical compositions of individual samples are similar, there are significant differences in uncorrected carbon-14 age and in inorganic and stable-isotope composition. Flow surveys of seven wells performed using iodine-131 as a tracer indicate that ground-water production …


Lithologic And Structural Controls On Karst Landforms Of The Mitchell Plain, Indiana, And Pennyroyal Plateau, Kentucky, Frederick Jennings Woodson Aug 1981

Lithologic And Structural Controls On Karst Landforms Of The Mitchell Plain, Indiana, And Pennyroyal Plateau, Kentucky, Frederick Jennings Woodson

All-Inclusive List of Electronic Theses and Dissertations

Karst features in Harrison County, Indiana, and the Mammoth Cave region, Kentucky, are profoundly influenced by lithology and structure. In the Sinkhole Plain two classes of sinkholes, shallow solutional and deeper subsidence, differ in morphology, origin, age, distribution, and density. Distributions of the two kinds of sinkholes reflect the outcrop pattern of specific lithostratigraphic units. Broad shallow dolines (Ste. Genevieve-type sinks) develop on the Horse Cave Member of the St. Louis Limestone and on the Ste. Genevieve, Girkin, and Paoli Limestones. Innumerable steeper-sided subsidence and collapse depressions (St. Louis-type sinkholes) form on the Corydon Chert Member, lower St. Louis Limestone, …


Some Chemical And Mineralogical Aspects Of Plutonic Rocks From The North Arm Mountain Massif, Bay Of Islands Ophiolite, Newfoundland, Jerry W. Sullivan Jan 1981

Some Chemical And Mineralogical Aspects Of Plutonic Rocks From The North Arm Mountain Massif, Bay Of Islands Ophiolite, Newfoundland, Jerry W. Sullivan

Geology Theses and Dissertations

Whole-rock major and trace element compositions of one basalt, one diabase, and 21 rocks from the magmatic-plutonic units of the North Arm Mountain massif, Bay of Islands ophiolite, Newfoundland, were determined. Mineral compositions of a subset of the plutonic rocks were also determined.
The major and trace element compositions of the basalt and diabase are similar to abyssal tholeiites, and this is consistent with the REE data of Malpas (1978) and Suen, et. al. (1979) that suggest the lavas and dikes formed from a depleted or slightly enriched abyssal tholeiitic magma. The alkaline nature of the magma proposed by several …


Tourmaline - A Prospecting Guide For Massive Base-Metal Sulfide Deposits In The Penobscot Bay Area, Maine, John F. Slack Jun 1980

Tourmaline - A Prospecting Guide For Massive Base-Metal Sulfide Deposits In The Penobscot Bay Area, Maine, John F. Slack

Maine Collection

Tourmaline - A Prospecting Guide for Massive Base-Metal Sulfide Deposits in the Penobscot Bay Area, Maine


by John F. Slack, U.S. Geological Survey

Special Economic Studies Series No.8

Maine Geological Survey, Department of Conservation, Augusta, Maine (June, 1980).

Contents: Abstract / Introduction / Geologic Setting / Massive Sulfide Deposits / Tourmaline Occurrences / Tourmaline: A Guide to Ore / Acknowledgements / References Cited




Chemistry Of The Spring Waters Of The Ouachita Mountains Excluding Hot Springs, Arkansas, George H. Wagner, Kenneth F. Steele Mar 1980

Chemistry Of The Spring Waters Of The Ouachita Mountains Excluding Hot Springs, Arkansas, George H. Wagner, Kenneth F. Steele

Arkansas Water Resources Center Technical Reports

This report is based on the chemical analysis of the waters from 93 springs and 9 wells. Springs, when free from metal plumbing, provide an uncontaminated source of the ground water and it was desired to obtain water uncontaminated with metals. A few wells were added to the list, usually because of their unique location in the sampling grid.


A Statistical Analysis Of The Quality Of Surface Water In Nebraska, R. A. Engberg Jan 1980

A Statistical Analysis Of The Quality Of Surface Water In Nebraska, R. A. Engberg

United States Geological Survey: Publications

This report provides descriptive statistics for 29 chemical or biological constituents for 109 stream sites in Nebraska sampled by the U.S. Geological Survey beginning in 1946. Also provided for each site are regression equations relating specific conductance to each of 12 chemical constituents and a regression equation relating specific conductance to stream discharge. The descriptive statistics are presented by river basins. Water leaving these basins that has the lowest mean specific conductance (266 umho/cm) is from the Niobrara River at Verdel, and water that has the highest (1,890 umho/cm) is from the South Platte River at Roscoe. Statewide, the principal …


Saratoga: The Bubbles Of Reputation And Their Implications For An Embryonic Rift System In The Upper Hudson River Valley, James R. Young Jan 1980

Saratoga: The Bubbles Of Reputation And Their Implications For An Embryonic Rift System In The Upper Hudson River Valley, James R. Young

Geology Theses and Dissertations

Carbonated, alkaline, saline waters occur over a wide area in the upper Hudson River Valley approaching 1,000 square miles. Through the sampling (spring and fall) of 39 locations, half of which were hitherto unsampled, the waters are shown to be a complexly mixed system with at least five major components.
They are:
1) a gaseous phase consisting primarily of CO2;
2) a fluid (containing the dissolved CO2) possibly analogous to a metamorphic brine whose major chemistry is HCO3>Na>Cl;
3) formational waters of variably low salinities which may be the end products of progressive dilution of Paleozoic connate brines …


The Geology And Geochemistry Of The North Fork Stock, Northeastern Oregon, David Joseph Matty Jun 1979

The Geology And Geochemistry Of The North Fork Stock, Northeastern Oregon, David Joseph Matty

Dissertations and Theses

The North Fork stock is a composite intrusive body of Late Jurassic-Early Cretaceous age which outcrops in the Blue Mountains of northeastern Oregon. The upper 600 m of the intrusion are exposed over an area of approximately 36 km2 along the canyon walls of the North Fork of the John Day River in Grant and Umatilla counties. The stock intrudes metasediments, metavolcanics, and metagabbros associated with the Permian-Triassic Elkhorn Ridge Argillite. Contact metamorphism of the Elkhorn Ridge Argillite is developed to the hornblende-hornfels facies throughout most of the exposed area of this unit in the study area. The contact …


Petrology And Mineral Chemistry Of Some Jan Mayen Volcanics, Carla A. White Jan 1979

Petrology And Mineral Chemistry Of Some Jan Mayen Volcanics, Carla A. White

Geology Theses and Dissertations

The island of Jan Mayen is the northernmost active volcano on the Mid-Atlantic Ridge. The rocks of Jan Mayen belong to the potassic series of the alkaline rocks and appear to belong to the straddle type association. The ankaramites and alkali olivine basalts are characterized by the presence of large xenocrysts of rimmed chromium diopside, titaniferous salite, olivine (Fo83 to Fo88), magnetite and sometimes plagioclase (bytownite rimmed by labradorite). Phenocrysts of olivine (Fo74) and plagioclase (andesine) are present in several rocks. These and phenocrysts lie in a matrix composed of` titaniferous salite, olivine (Fo58), plagioclase (andesine), magnetite, biotite and sometimes …


The Distribution Of Several Metals And Cation Exchange Capacity In Sediment Fractions From An Artificial And Natural Marsh, James River, Virginia, William Nivens Jul 1978

The Distribution Of Several Metals And Cation Exchange Capacity In Sediment Fractions From An Artificial And Natural Marsh, James River, Virginia, William Nivens

OES Theses and Dissertations

In order to examine the mechanisms by which Fe, Mn, Ca, Zn, Cu, Ni and Pb are bound in sediments, a sequential selective extraction procedure was employed on sediment samples collected at an experimental dredge disposal marsh and a neighboring natural marsh located near Windmill Point, James River, Va. The metal concentrations were determined in six phases, interstitial water, exchangeable, easily reducible (oxides of Mn), organic, moderately, reducible (oxides of Fe), and residual fractions. In addition, the cation exchange capacity (CEC) of the sediments was determined as well as the actual role of organics and colloidal iron coatings as they …


Sediment Interstitial Dissolved Mercury And Carbon Relationships In An Artificial And Natural Marsh, James River, Virginia, Apostolos Katsaounis Jul 1977

Sediment Interstitial Dissolved Mercury And Carbon Relationships In An Artificial And Natural Marsh, James River, Virginia, Apostolos Katsaounis

OES Theses and Dissertations

Thirty six sediment cores were collected during August, 1976 and January, 1977 in order to examine the relationships between dissolved organic carbon and total dissolved mercury in the interstitial water of two marshes located near Windmill Point, James River, 16 km downstream from Hopewell, Virginia. The Windmill Point marsh development site is a dredged material disposal island in the James River. The reference marsh which does not contain dredged material, is located 2.3 km upstream at Ducking Stool Point.

The concentrations of dissolved organic carbon and total dissolved mercury showed no significant difference between the two marshes. Trends in the …


Petrology Of The Oceanographer Fracture Zone (35ºn35ºw), Tsugio Shibata Jan 1976

Petrology Of The Oceanographer Fracture Zone (35ºn35ºw), Tsugio Shibata

Geology Theses and Dissertations

During a geological and geophysical survey of the Oceanographer Fracture Zone (35°N, 35°W), seventeen dredge hauls containing a variety of rocks were obtained. Petrographic study shows that these rock samples can be classified into six main rock types: fresh basalt, weathered basalt, metabasalt, gabbro, metagabbro, and serpentinite. Most of the dredge hauls were positioned on the steep, southern wall of the fracture zone, and an inference from the dredging results suggests that basalt is the most abundant rock type which outcrops at the junction between the rift valley and the fracture zone; however, as we move away from the junction, …


Processes Controlling The Distribution Of Methane In The Cariaco Tranch, Venezuela, Denis A. Wiesenburg Jul 1975

Processes Controlling The Distribution Of Methane In The Cariaco Tranch, Venezuela, Denis A. Wiesenburg

OES Theses and Dissertations

Abstract unavailable.


Maine Gems And Gem Minerals, Maine State Museum Jan 1973

Maine Gems And Gem Minerals, Maine State Museum

Maine Collection

Maine Gems and Gem Minerals

The Maine State Museum - Printed under Appropriation No. 1741.1

Sections Include : "An Introduction to the Gemstones of Maine", "Tourmaline", "Beryl", "Quartz Family Gems", "Topaz", "Gold", "Miscellaneous Gem Varieties", "Maine's 'Lost' Gem Mines", "Hamlin Necklace", etc


The Geology Of The Pittsburg Landing Area, Snake River Canyon, Oregon-Idaho, David L. White Aug 1972

The Geology Of The Pittsburg Landing Area, Snake River Canyon, Oregon-Idaho, David L. White

All-Inclusive List of Electronic Theses and Dissertations

The major purpose of the study was to map, describe, and correlate the pre-Tertiary rocks. Accessible and excellent exposures at Pittsburg Landing enabled the writer to make a somewhat detailed study of the stratigraphy. The thesis area also offered an opportunity to study in a reconnaissance manner, the Tertiary Columbia River Basalt as described by Waters, and more recently y Ozier.


History Of Sedimentation In Montsweag Bay, Detmar Schnitker Jan 1972

History Of Sedimentation In Montsweag Bay, Detmar Schnitker

Maine Collection

History of Sedimentation In Montsweag Bay

by Setmar Schnitker

Bulletin #25, Department of Forestry, Augusta, Maine, 1972.

Contents: Abstract / Introduction / Geographic Setting / Seismic Profiling / Pleistocene Sediments / Holocene Sediments / Actual Sedimentation /. Suspended Sediments / Recent Changes / Outlook / Acknowledgements / References


Petrology Of The Nemeiben Lake Ultramafic And Associated Nickel-Sulphide Deposits, Anantaramam Peddada Jan 1972

Petrology Of The Nemeiben Lake Ultramafic And Associated Nickel-Sulphide Deposits, Anantaramam Peddada

Geology Theses and Dissertations

The Nemeiben Lake ultramafic body is located in the center of Saskatchewan, Canada, within the Churchill Province of the Canadian Shield. The ultramafic rocks consist of serpentinites, partly serpentinized and uralitized pyroxenite, and unaltered pyroxenite. Associated sulphide mineralization is of disseminated, net texture, and fracture filling types. The ore minerals present are pyrrhotite, pentlandite, chalcopyrite, pyrite, marcasite, violarite, bravoite and native copper. The sulphides are considered to be initially of magmatic origin formed from a sulphide melt separated at a late stage during crystallization of the ultramafic rocks. Subsequent serpentinization has locally redistributed the ores.
Serpentinization in the Nemeiben Lake …


Geology Of The Moose River And Roach River Synclinoria, Northwestern Maine, Arthur J. Boucot, Edward W. Heath Aug 1969

Geology Of The Moose River And Roach River Synclinoria, Northwestern Maine, Arthur J. Boucot, Edward W. Heath

Maine Collection

Geology of the Moose River and Roach River Synclinoria, Northwestern Maine

by Arthur J. Boucot, with contributions by Edward W. Heath

Bulletin No.21, Maine Geological Survey

Department of Economic Development, Augusta, Maine (August, 1969).

Contents: Abstract / Introduction / Stratigraphy / Intrusive Rocks / Metamorphism / Structure / Large Scale Maps / Somerset Island / Lobster Island / Historical Geology / The Problem of Shell Beds / References / Appendix I /


Paleotectonic Investigations Of The Permian System In The United States, Edwin D. Mckee, Stephen S. Oriel, Henry L. Berryhill, Eleanor J. Crosby, Donald A. Myers, George H. Dixon, Marjorie E. Maclachlan, Melville R. Mudge, Edwin K. Maughan, Richard P. Sheldon, Earl R. Cressman, Thomas M. Cheney, Walter E. Hallgarth, Keith B. Ketner Jan 1967

Paleotectonic Investigations Of The Permian System In The United States, Edwin D. Mckee, Stephen S. Oriel, Henry L. Berryhill, Eleanor J. Crosby, Donald A. Myers, George H. Dixon, Marjorie E. Maclachlan, Melville R. Mudge, Edwin K. Maughan, Richard P. Sheldon, Earl R. Cressman, Thomas M. Cheney, Walter E. Hallgarth, Keith B. Ketner

United States Geological Survey: Publications

(A) Allegheny region, by Henry L. Berryhill, Jr

(B) Gulf Coast region, by Eleanor J. Crosby

(C) West Texas Permian basin region, by Steven S. Oriel, Donald A. Myers, and Eleanor J. Crosby

(D) Northeastern New Mexico and Texas-Oklahoma Panhandles, by George H. Dixon

(E) Oklahoma, by Marjorie E. MacLachlan

(F) Central Midcontinent region, by Melville R. Mudge

(G) Eastern Wyoming, eastern Montana, and the Dakotas, by Edwin K. Maughan

(H) Middle Rocky Mountains and northeastern Great Basin, by Richard P. Sheldon, Earl R. Cressman, Thomas M. Cheney, and Vincent E. McKelvey

(I) Western Colorado, southern Utah, and northwestern New …


Roughness Characteristics Of Natural Channels, Harry H. Barnes Jr. Jan 1967

Roughness Characteristics Of Natural Channels, Harry H. Barnes Jr.

United States Geological Survey: Publications

Color photographs and descriptive data are presented for 50 stream channels for which roughness coefficients have been determined. All hydraulic computations involving flow in open channels require an evaluation of the roughness characteristics of the channel. In the absence of a satisfactory quantitative procedure this evaluation remains chiefly an art. The ability to evaluate roughness coefficients must be developed through experience. One means of gaining this experience is by examining and becoming acquainted with the appearance of some typical channels whose roughness coefficients are known. The photographs and data contained in this report represent a wide range of channel conditions. …


A Detailed Economic Investigation Of Geochemical And Aeromagnetic Anomalies North Central Maine, W. F. Stickney, R. S. Young, L. A. Wing Mar 1965

A Detailed Economic Investigation Of Geochemical And Aeromagnetic Anomalies North Central Maine, W. F. Stickney, R. S. Young, L. A. Wing

Maine Collection

A Detailed Economic Investigation of Geochemical and Aeromagnetic Anomalies North Central Maine

W.F.Stickney, R.S.Young and L.A.Wing

Special Economic Series No.4, Maine Geological Survey, Department of Economic Development, Augusta, Maine (March 1965).

Contents: Foreword / Part I - Geology (W.F. Stickney) / Part II - Geophysics (R.S. Young) / Part III - Geochemistry (L.A. Wing) / References


Geologic And Ground-Water Reconnaissance Of The Loup River Drainage Basin Nebraska, R. T. Sniegocki, R. H. Langford Jan 1959

Geologic And Ground-Water Reconnaissance Of The Loup River Drainage Basin Nebraska, R. T. Sniegocki, R. H. Langford

United States Geological Survey: Publications

The Loup River and its tributaries drain an area of about 15,230 square miles in central Nebraska. The upper three-fifths of the drainage basin is in the Sand Hills region of Nebraska, and the lower two-fifths is in the loess plains and hills region. An eastward-thinning wedge of semiconsolidated and unconsolidated deposits of Tertiary and Quaternary age underlies the surficial dune sand and loess. These deposits, which are recharged by infiltrating precipitation, contain a tremendous volume of water at least 400 million acre-feet and annually discharge about 1.7 million acre-feet into streams. Although wells supply nearly all the water used …


Maine Pegmatite Mines And Prospects And Associated Minerals, Maine Geological Survey Mar 1957

Maine Pegmatite Mines And Prospects And Associated Minerals, Maine Geological Survey

Maine Collection

Maine Pegmatite Mines and Prospects and Associated Minerals

Minerals Resources Index No.1 - Maine Geological Survey

Department of Development of Industry and Commerce, Augusta, Maine (March 1, 1957).

Contents: Introduction / Acknowledgments / Explanatory Considerations / Selected Bibliography / Pegmatite Mines and Prospects - Alphabetical Index / Pegmatite Mines and Prospects - County-Township Index / Pegmatite Mines and Prospects - Map Index.

Also Includes: Southwestern Maine - Pegmatite Localities and Access Highways / Index Map Showing Mining Districts and Detailed Plate Locations


Genetic Study Of Some Pyrrhotite Deposits Of Maine And New Brunswick, Dept. Of Development Of Industry And Commerce Jan 1956

Genetic Study Of Some Pyrrhotite Deposits Of Maine And New Brunswick, Dept. Of Development Of Industry And Commerce

Maine Collection

Genetic Study of Some Pyrrhotite Deposits of Maine and New Brunswick

by Robert S. Houston

Maine Geological Survey - Bulletin 7

Department of Development of Industry and Commerce, Augusta, Maine (January, 1956).

Contents: Abstract / Introduction / Field and Laboratory Studies / Regional Geography / Regional Geology / Pyrrhotite Deposits / Description of Individual Deposits / Literature Cited



Report Of The State Geologist 1953-1954, Maine Geological Survey Jul 1955

Report Of The State Geologist 1953-1954, Maine Geological Survey

Maine Collection

Report of the State Geologist 1953-1954.

Maine Geological Survey - Maine Development Commission, Augusta, Maine - July 1955.

Contents: Joseph M. Trefethen -- Review of Maine Mineral Outlook / Henry W. Allen -- Limestone Investigations, 1953-54 / Wm.T. Forsyth -- Airbourne Magnetometer Survey in Eastern Maine / Gary M. Boone -- Petrology of the Farmington, Maine Area / Joseph M. Trefethen, Henry Allen, and Wm. T. Forsyth -- Scheelite Occurrences in Maine / Wm.T. Forsyth -- Beneficiation Tests on the Warren Sillimanite Gneiss / Wm. T. Forsyth -- Pyrrhotite Mineralization at Iron Hill, Gardiner, Maine / Joseph M. Trefethen -- …