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Lovering, Thomas Seward

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Album caption: Main vein of Wellington mine, Oro third level, cut by flat fault dipping south (see mine notebook): vein follows intrusive contact of porphyry; shale above porphyry and vein to right; jasper (?) to left. Breckenridge district, Summit County, Colorado. ca. 1926.
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Panoramas looking south from the south end of Teller Mountain near the Cashier Mine; glacial trenching of the Flattop peneplain is well shown. Summit County, Colorado. Circa 1927. Plate 8-B, U.S. Geological Survey, Professional paper 178. 1935.
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Album caption and index card: Unmineralized part of tungsten vein 200 feet west of large ore shoot, 100-foot level of Tungsten Vein mine. Note interior faulting and drag in barren sheeted zone (sz), showing the hanging wall (hw) has dropped. Boulder County, Colorado. Notes: Published as figure XXII in U.S.Geological Survey. Professional Paper 223. 1950.
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Album caption and index card: Photomicrograph of intrusion breccia of group 11 from Logan mine, 5 miles west of Boulder. Highly fragmented granite and some porphyry and early vein material lie in a biotite-flecked glassy groundmass that is partly silicified and sericitized. b, Fragment of biotite latite; g, glassy groundmass. Crossed nicols. Boulder County, Colorado. Notes: Published as figure XVII-A in U.S.Geological Survey. Professional Paper 223. 1950.
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Album caption and index card: Looking east at the Maxwell breccia reef near the junction of Fourmile Creek and North Boulder Creek. At this exposure the reef consists of brecciated Boulder Creek granite, moderately silicified and stained with hematite. The breccia reef has been mapped previously as pegmatite dike cutting the granite. Boulder County, Colorado. Notes: Published as figure XX-A in U.S.Geological Survey. Professional Paper 223. 1950.
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