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periods of folding

*
map envelope, unopened
(details, NW rotated 90ºccw, SW rotated 90ºcw)
in Waldemar Lindgren. Ore Deposits of the Jerome and Bradshaw Mountains Quadrangles, Arizona. U.S.G.S. Bulletin 782 (1926)
bound in Contributions to Economic Geology (short Papers and Preliminary Reports, 1925: Part I. — Metals and Nonmetals Except Fuels, Issues 777-783)
Stanford (Branner Geological Library) copy, no date of digitization
from which —
 

• a series of folds                 780-A / 19
  overturned folds                 780-A / 21
  their folding broke                 780-A / 30
• folds. doubtless                 780-B / 40
  also later folding accentuating                 780-B / 114
  local folding                 780-B / 122

• more or less complicated folds                 781-B / 22
  upward folds                 781-B / 22
  downward folds                 781-B / 22
  folds of certain types                 781-B / 22
  complicated by minor folding and much faulting                 781-B / 23
  these folds therefore offer some encouragement                 781-B / 26

• and older beds, where the folding                 783 / 159
  close folding                 783 / 161
  in which the folding is more open                 783 / 161
• folding of                 783 / 162
  folding does                 783 / 162
  folding which                 783 / 162
• separated one from another by folds that bend         783 / 162
  or by unfolded                 783 / 162
• experiments in folding                 784 / 31
  periods of folding                 784 / 71

—

being a selection of folds and folding — about a third of all — in entire volume.
figure before page number indicates USGS Bulletin number.
 

20 June 2015

tags:
economic geology; foldings; folds
W. Lindgren