Browsing by Subject "occurrence"
Now showing 1 - 20 of 23
- Results Per Page
- Sort Options
Item Fishes of Texas Project: update and future(2023-02-23) Hendrickson, Dean; Cohen, Adam; Garrett, GaryFish occurrence data are widely scattered and mostly not published as data readily utilizable by computers. Global biodiversity aggregating services (e.g. GBIF, iDigBio, Fishnet) now aggregate and serve whatever data are submitted to them in the standard Darwin Core format, but their data are often replete with errors, minimally normalized, lacking content across standard fields, and served via generic mapping services lacking linkages to local and aquatic ecology-relevant resources (i.e., for fishes, they are ignorant of hydrography). In contrast, Fishes of Texas (FoTX) includes the same data and much more, including unpublished data from more diverse sources. FoTX’s rigorous quality-control measures, including specimen-based ID verifications, checking of legacy georeferencing, and flagging suspicious records has combined to greatly reduce errors. The custom FoTX website provides interactive exploration and data summarization, within the context of geopolitical and, now geographically-expanded hydrographic coverages, thus facilitating visualization and discovery of conservation-relevant histories and trends over time. The site allows viewing of derivative products, such as niche models, estimates of native ranges, checklists, data dashboards, and Native Fish Conservation Areas. The site also serves extensive image collections, collectors’ field notes, and links to digitized, formerly inaccessible unpublished agency reports. Finally, core FoTX data fields are also published to GBIF as Darwin Core to make it available to the world.Item Geologic and Hydrologic Controls on the Occurrence and Producibility of Coalbed Methane: Fruitland Formation, San Juan Basin(1991) Ayers, Jr., W. B.; Kaiser, W. R.; Laubach, Stephen E. (Stephen Ernest), 1955-Â ; Ambrose, William A. Â ; Baumgardner, Jr., Robert W.; Scott, Andrew R.; Tyler, Roger; Yeh, Joseph S.Coalbed methane resources in the Fruitland Formation in the San Juan Basin are estimated to be 43 to 49 trillion cubic feet at depths between 400 and 4,200 ft. The San Juan Basin leads the United States in coalbed methane production; in 1989, the basin produced approximately 65 billion cubic feet of coalbed methane. In the past 5 years, more than 1,000 coalbed methane wells have been drilled in the basin. The thickest Fruitland coal seams occur in the northern part of the basin and trend northwestward, paralleling Pictured Cliffs barrier/strandplain sandstones; in the southern part of the basin, anomalously thick coal seams trend northeastward and occur between Fruitland fluvial sandstone complexes. Fruitland coal seams commonly are extensive, overriding sandstones. Coal beds are fractured reservoirs, and commonly, permeability is greatest in the direction of the dominant fracture set (face cleat). Face cleat strikes in Fruitland coal beds delineate two principal domains. In the southern part of the basin, face cleats strike northward or northeastward, whereas in the northern part of the basin, face cleat strike is predominantly northwestward. Coal seams, major aquifers in the Fruitland Formation, are overpressured in the northern part of the basin due to artesian conditions. These overpressured coal seams commonly are water-productive. In the southern part of the basin, the Fruitland Formation is underpressured, and coalbed methane wells produce little or no water. The composition of Fruitland coalbed gas varies regionally and predictably; both dry and wet Fruitland gases are present, and carbon dioxide content ranges up to 13 percent. On the basis of geologic and hydrologic studies, the San Juan Basin was divided into regions in which Fruitland coal beds have similar reservoir characteristics.Item Letter to Curtis J. Hesse from H.B. Stenzel on 1943-01-13(1943-01-13) Stenzel, Henryk B.Item Letter to H.B. Stenzel from Chester Stock on 1946-02-27(1946-02-27) Stock, ChesterItem Letter to H.B. Stenzel from Curt Teichert on 1962-07-09(1962-07-09) Teichert, CurtItem Letter to H.B. Stenzel from Curt Teichert on 1969-12-31(1969-12-31) Teichert, CurtItem Letter to H.B. Stenzel from J.E. McCall on 1954-05-03(1954-05-03) McCall, J.E.Item Letter to H.B. Stenzel from Le Brun N. Smith on 1957-02-21(1957-02-21) Smith, Le Brun N.Item Letter to H.B. Stenzel from Lloyd W. Staples on 1949-04-19(1949-04-19) Staples, Lloyd W.Item Letter to H.B. Stenzel from M.E. Denaeyer on 1949-05-12(1949-05-12) Denaeyer, M.E.Item Letter to H.B. Stenzel from R.L. Ethington on 1965-05-10(1965-05-10) Ethington, R.L.Item Letter to H.B. Stenzel from Remington Kellogg on 1934-09-12(1934-09-12) Kellogg, RemingtonItem Letter to H.B. Stenzel from Remington Kellogg on 1935-10-07(1935-10-07) Kellogg, RemingtonItem Letter to Henryk B. Stenzel from Katherine V.W. Palmer on 1957-12-30(1957-12-30) Palmer, Katherine V.W.Item Letter to Henryk B. Stenzel from Ronald W. Sherwood on 1970-03-24(1970-03-24) Sherwood, Ronald W.Item Letter to Henryk B. Stenzel from Wann Langston, Jr. on 1966-03-02(1966-03-02) Langston, Wann , Jr.Item Letter to Henryk Stenzel from Norman D. Newell on 1948-03-04(1948-03-04) Newell, Norman D.Item Letter to J.Kenneth Blackmar from H.B. Stenzel on 1943-09-20(1943-09-20) Stenzel, Henryk B.Item Letter to Jorgen Wind from H.B. Stenzel on 1950-02-16(1950-02-16) Stenzel, Henryk B.Item Letter to Paul S. Galtsoff from H.B. Stenzel on 1963-05-23(1963-05-23) Stenzel, Henryk B.