Technical Report Archive & Image Library (TRAIL) - 67 Matching Results
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- 40Ar/39Ar Age Spectra and Total-Fusion Ages of Tektites from Cretaceous-Tertiary Boundary Sedimentary Rocks in the Beloc Formation, Haiti
- A report about Haitian tektites at the paleontological K-T boundary along with an Ir abundance anomaly and shocked quartz.
- Aeroradioactivity Survey and Geology of Puerto Rico (ARMS-I)
- Report containing an aeroradioactivity survey of Puerto Rico made on behalf of the Division of Biology and Medicine, United States Atomic Energy Commission. Topics include the types of bedrock noted in the area as well as their levels of radioactivity.
- Aluminous Lateritic Soil of the Republic of Haiti, W.I.
- From abstract: Aluminous lateritic soil containing as much as 50 percent of alumina (A120) Is found in several places in the Republic of Haiti. The largest deposits are on the Rochelois Plateau southwest of Miragoane on the Southern Peninsula. Mapping and drilling of the deposits indicate fifteen million long tons in place (dried basis). It is estimated that a minimum of 10 million long tons of this reserve is recoverable. The average chemical composition of this material is as follows: A1203, 46.8 percent; SiO2, 3.4 percent; T1O2, 2.8 percent; Fe20, 21.9 percent ; P206, 0.6 percent ; MnO5, 0.5 percent ; and loss on ignition, 24.1 percent. Other localities in which similar lateritic soil occurs are Beaumont in the Massif de la Hotte ; the vicinity of Savane Zombi in the Massif de la Selle ; and Savane Terre Rouge on the plateau northwest of Gonaives. In none of these regions were large deposits found.
- Analog Model Analysis of the North Coast Limestone Aquifers, Puerto Rico
- This report presents an analysis of "three limestone aquifers on the north coast of Puerto Rico west of the RÍo de la Plata" using "analog modeling techniques."
- Analysis and Summary Report of Operation Guantanamo Naval Base Desalination Facility
- Report analyzing the Guantanamo Naval Base 2.25 MGD desalting and power generation facility in order to create a guide for the research and development programs for the Office of Saline Water and for commercial desalinization facilities.
- Boiling Nuclear Superheater (BONUS) Power Station : Final Hazards Summary Report
- Summary report of final hazards for the Boiling Nuclear Superheater (BONUS) Power Station with illustrations.
- Copper Mining in North America
- From introduction: "In this paper are assembled and summarized many subjects relating to the copper industry in North America. Production of mines and districts, history of the industry in North America. Production of mines and districts, history of the industry, geology, of the principal deposits, and mining methods and costs are discussed."
- [Digitized Accelerogram and Earthquake Tables]
- Computer printout listings of three data tables (Digitized Accelerogram, Recording Station, and Earthquake) organized alphabetically by country.
- Floods in Puerto Rico, Magnitude and Frequency
- This report used "annual peak-discharge records at fifty sites with five or more years of record" to determine individual site frequency curves. It includes several maps.
- Geology and Chromite Deposits of the Camagüey District, Camagüey Province, Cuba
- From abstract: Geophysical prospecting by gravity methods has been successful in finding new deposits in the [Camaguey] district, and the present studies have brought out new information on the localization and attitudes of the known deposits that may be of assistance in planning future geophysical work.
- Ground Water in the Lajas Valley, Puerto Rico
- Abstract: Lajas Valley is plagued with problems of salinity and waterlogging the soils. Use of brackish (500 milligrams per liter) irrigation compounded ground water for the problem until an irrigation-drainage system was constructed in 1955. Lajas is an alluvium-filled limestone highlands. The alluvium, mostly clay and as much 300 feet (90 meters) thick, contains brackish ground water except in the recharge areas located along the foothills...Results from a digital model show that a network of discharge wells could alleviate waterlogging of the soils in the artesian area.
- Ground Water in the San Juan Metropolitan Area, Puerto Rico
- From introduction: A post-drought analysis of the sources of water supply for the metropolitan area indicated a need for better knowledge of the ground-water resources. A study was implemented through the cooperative water-resources investigation program between Commonwealth agencies of Puerto Rico and the U.S. Geological Survey.
- The Hawaiian Monk Seal and Green Turtle on Necker Island, 1983
- Abstract: Between 24 July and 6 August 1983, a two-person National Marine Fisheries Service field camp examined the Hawaiian monk seal, Monachus schauinslandi, and green turtle, Chelonia mydas, populations of Necker Island. Forty-three seals were identified, photographic records for seal identification were made, and 21 animals were bleach marked. Of three pups at Necker, only one weaned during the study period and was tagged. A pregnant femals was found dead and a necropsy was performed. Eighty-eight turtle observations included feeding (59), basking (18), and swimming (11) sightings. Four turtles were individually identified; three of these were flipper-tagged.
- History of Dredging and Filling of Lagoons in the San Juan Area, Puerto Rico
- Abstract: Laguna La Torrecilla, Laguna de Pinones, Laguna San Jose, and Laguna del Condado, in the San Juan, Puerto Rico area, are located within a metropolitan area of more than 1 million people. Bathymetric maps made during the study, in 1973, showed that Lagunas La Torrecilla, San Jose, and del Condado have been modified by dredging and filling; whereas, Laguna de Pinones has remained in a near natural state. Laguna La Torrecilla has been dredged to a depth, in places, of about 18 metres, and Lagunas San Jose and del Condado, in places to about 11 meters. Dredging in the San Juan lagoons has been harmful, beneficial, and in a few instances has had little or no noticeable effect on the water quality. Usually, dredging in the connecting canals has been beneficial if the water entering the lagoons through the canals was of better quality than the water in the lagoon. Dredging in the mouths of lagoons has been beneficial; whereas, filling or blocking the mouths has been harmful.
- Hydrologic Characteristics of Lagoons at San Juan, Puerto Rico, During a Januray 1974 Tidal Cycle
- From introduction: This report presents observed data on the interlagoon and ocean exchange of the flows of water, sediment, and selected chemicals for a tidal cycle in January 1974.
- Iron-Ore Resources of the United States: Including Alaska and Puerto Rico, 1955
- From introduction: The purpose of this report is to summarize available information concerning iron-ore resources in the United States in order to provide a general background for understanding and appraising the present status of this basic commodity.
- Limnology of Lago Loiza, Puerto Rico
- From purpose and study: The principal objectives of this study were as follows: (1) to determine the existing water-quality conditions in Lago Loiza as reflected by the principal chemical, physical, biological and bacteriological characteristics in the lake and its tributaries. (2) To estimate the reservoir's water budget during the study period, including the contributions from the tributaries and other sources. (3) Estimation of the reservoir's overall nitrogen and phosphorus budget, including the principal sources and sinks of these nutrients. (4) Definition of the sedimentation rate in the reservoir.
- Limnology of Laguna Tortuguero, Puerto Rico
- Abstract: The principal chemical, physical and biological characteristics, as well as the hydrology of Laguna Tortuguero, Puerto Rico, were studied from 1974-75. The lagoon, with and area of 2.24 square kilometers and a volume of about 2.68 million cubic meters, contains about 5 percent of seawater. Drainage through a canal on the north side averages 0.64 cubic meters per second per day, flushing the lagoon about 7.5 times per year. Chloride and sodium are the principal ions in the water, ranging from 300 to 700 mg/L and 150 to 400 mg/L, respectively. Among the nutrients, nitrogen averages about 1.7 milligrams per liter, exceeding phosphorus in a weight ratio of 170:1. About 10 percent of the nitrogen and 40 percent of the phosphorus entering the lagoon is retained. The bottom sediments, with a volume of about 4.5 million cubic meters, average 0.8 and 0.014 percent nitrogen and phosphorus, respectively.
- Mammals of the La Selva-Braulio Carrillo Complex, Costa Rica
- Summary of 142 species of mammals of Costa Rica, including geographical distribution, subspecies, last documented sighting in Costa Rica, and origin of specimen examined for each species.
- Mineral Deposits of Central America
- From introduction: This report is based on investigations carried on by the Geological Survey (U. S. Department of the Interior) under the auspices of the Interdepartmental Committee on Scientific and Cultural Cooperation (U. S. Department of State) and the Foreign Economic Administration. The function of the last two agencies is presently carried on by the International Cooperation Administration. Roberts is responsible for the text of this report and for the compilation of the geologic map. He was in Central America from January to April 1942 under a program of scientific and technical cooperation with the American Republics sponsored by the Department of State, and mapped manganese deposits in Costa Rica and manganese and antimony deposits in Honduras.
- Plate 1. Natural Gamma Aeroradioactivity and Generalized Geologic Maps of Puerto Rico
- Map with graded color shading to show levels of naturally-occurring gamma aeroradioactivity within Puerto Rico. Details about the survey and map creation are printed at right. Scale 1:250,000.
- Possibilities for uranium in Costa Rica
- Discussing the potential for Costa Rica to be used as a uranium source.
- Puerto Rico Energy Center Study: Executive Study
- From background: The study is an outgrowth of investigations by the Atomic Energy Commission and the Office of Saline Water into the use of nuclear energy to supply heat for desalting seawater and for generating electricity, and of work on the energy center concept conducted at the AEC's Oak Ridge National Laboratory. The bases for the study were set forth in a Memorandum of Understanding signed by Commissioner James T. Ramey of the United States Atomic Energy Commission, Under Secretary David S. Black of the United States Department of the Interior, Acting Executive Director Fernando Torrent of the Puerto Rico Water Resources Authority, and Executive Director Orlando Gonzalez of the Puerto Rico Aqueduct and Sewer Authority.
- Puerto Rico Energy Center Study: Executive Summary
- From introduction: The scope of work of the study was to compile and analyze information on the resources and requirements of the southwestern, southeastern, and north-central coastal regions of the Commonwealth, and assess industrial and agricultural activities which in conjunction with the power and desalting plants, might comprise the energy center complex. The study was also to identify the need for any experimental, pilot or demonstration projects which benefit the practical application of the Energy Center concept in Puerto Rico.
- Puerto Rico Energy Center Study: Site Selection Supplement
- From introduction: The PRWRA has contracted with the AEC to study the application of an Energy Center in Puerto Rico. The authority in turn has retained Burns and Roe, Inc. as a subcontractor and the Dow Chemical Company as a major sub-subcontractor to carry out this study.
- Puerto Rico Energy Center Study: Volume 1
- From introduction: The scope of work of the study was to compile and analyze information on the resources and requirements of the southwestern, southeastern, and north-central coastal regions of the Commonwealth, and assess industrial and agricultural activities which in conjunction with the power and desalting plants, might comprise the energy center complex. The study was also to identify the need for any experimental, pilot or demonstration projects which benefit the practical application of the Energy Center concept in Puerto Rico.
- Puerto Rico Energy Center Study: Volume 2
- From introduction: This report concerns nuclear power plant deployment in Puerto Rico.
- Some Engineering Problems of the Panama Canal in Their Relation to Geology and Topography
- Report issued by the Bureau of Mines over issues encountered during construction of the Panama Canal. As stated in the introduction, "this report aims to discuss, from the viewpoint of the mining geologist, the bearing of topographic and geologic conditions on certain problems that arose in the construction of the Panama Canal" (p. 7). This report includes tables, maps, illustrations, and photographs.
- State Compensatory Provisions for Occupational Diseases
- From Introduction: "This publication includes the laws of the States, the District of Columbia, Puerto Rico, and the Virgin Island through 1964. Only those portions of the workmen's compensation laws which apply to or are related to and deletions from the basic law have been incorporated into the text of the law, thus making it unnecessary to search out the various amendments made each year."
- Statistical Summary of Daily Values Data and Trend Analysis of Dissolved-Solids Data at National Stream Quality Accounting Network (NASQAN) Stations
- From abstract: A statistical summary of the available continuous and once-daily discharge, specific-conductance, dissolved oxygen, temperature, and pH data collected at NASQAN stations during the 1973-81 water years and documentation of the period of record on which the statistical calculations were based are presented.
- Study of Clay Shale Slopes Along the Panama Canal, Report 3: Engineering Analyses of Slides and Strength Properties of Clay Shales Along the Gaillard Cut
- "The results of the engineering studies and analyses which provide guidance on shear strength parameters applicable to the stability evaluation of existing slopes along the Gaillard Cut, the effects of future modifications, and evaluation of newly excavated slopes in clay shales are summarized in this report" (abstract). This report includes the appendices containing enginering data, characteristics of materials, analysis of past slides, active slopes, and hydrographic survey data.
- United States Earthquakes, 1928
- Report discussing earthquake activity in the United States during 1928. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1929
- Report discussing earthquake activity in the United States during 1929. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1930
- Report discussing earthquake activity in the United States during 1930. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1931
- Report discussing earthquake activity in the United States during 1931. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1932
- Report discussing earthquake activity in the United States during 1932. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1933
- Report discussing earthquake activity in the United States during 1933. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1934
- Report discussing earthquake activity in the United States during 1934. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1935
- Report discussing earthquake activity in the United States during 1935. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1936
- Report discussing earthquake activity in the United States during 1936. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1937
- Report discussing earthquake activity in the United States during 1937. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1938
- Report discussing earthquake activity in the United States during 1938. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes 1940
- Report discussing earthquake activity in the United States during 1940. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes 1941
- Report discussing earthquake activity in the United States during 1941. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes 1942
- Report discussing earthquake activity in the United States during 1942. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1943
- Report discussing earthquake activity in the United States during 1943. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1944
- Report discussing earthquake activity in the United States during 1944. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1945
- Report discussing earthquake activity in the United States during 1945. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1946
- Report discussing earthquake activity in the United States during 1946. The report is broken down by regions and has sections for specific earthquakes.
- United States Earthquakes, 1947
- Report discussing earthquake activity in the United States during 1947. The report is broken down by regions and has sections for specific earthquakes.