Lineaments of Texas - possible surface expressions of deep-seated phenomena. Final report

Technical Report · Sat Mar 31 23:00:00 EST 1984

DOI:https://doi.org/10.2172/6906440· OSTI ID:6906440

Woodruff, Jr, C M; Caran, S C

Lineaments were identified on 51 Landsat images covering Texas and parts of adjacent states in Mexico and the United States. A method of identifying lineaments was designed so that the findings would be consistent, uncomplicated, objective, and reproducible. Lineaments denoted on the Landsat images were traced onto 1:250,000-scale work maps and then rendered cartographically on maps representing each of the 51 Landsat images at a scale of 1:500,000. At this stage more than 31,000 lineaments were identified. It included significant areas outside of Texas. In preparing the final lineament map of Texas at 1:1,000,000-scale from the 1:500,000-scale maps, all features that lay outside Texas and repetition among features perceived by individual workers were eliminated. Cultural features were checked for before reducing and cartographically fitting the mosaic of 51 individual map sheets to a single map base. Lineaments that were partly colinear but with different end points were modified into a single lineament trace with the combined length of the two or more colinear lineaments. Each lineament was checked to determine its validity according to our definition. The features were edited again to eliminate processing artifacts within the image itself, as well as representations of cultural features (fencelines, roads, and the like) and geomorphic patterns unrelated to bedrock structure. Thus the more than 31,000 lineaments originally perceived were reduced to the approximately 15,000 presented on the 1:1,000,000 map. Interpretations of the lineaments are presented.

• Research Organization: Texas Univ., Austin (USA). Bureau of Economic Geology
• DOE Contract Number: AS07-79ID12057
• OSTI ID: 6906440
• Report Number(s): DOE/ID/12057-T7; ON: DE84010827
• Country of Publication: United States
• Language: English

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