New PDF release: AGI Data Sheets: For Geology in the Field Laboratory and

By J. Thomas Dutro Jr., Richard Vincent Dietrich, Richard M. Foose

ISBN-10: 0922152012

ISBN-13: 9780922152018

One of many best-kept secrets and techniques in geology is that this convenient compilation of geological details. even supposing pocket-sized, this spiral-bound and easy-to-read publication deals an excessive amount of helpful details reminiscent of geologic map symbols, actual standards graphs and charts, projection nets, checklists, and data on approximately a hundred subject matters. excellent for speedy reference within the box, lab, and workplace.

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Additional info for AGI Data Sheets: For Geology in the Field Laboratory and Office

Sample text

Granitic rocks and pegmatites. Some mica schists. 8 Mineral Name-Composition Color II. LIGHT COLORED A. 88 Talc Mg SI 4o 3 Monoclinic Diagnostic Features Micaceous light color; folia Similar Speclas May be confused with phlogopile or lepidolite; biotite is the dark mica Common Occurrence Granites, pegmatites, metamorphic rocks, especially schists. Fine-grained fibrous variety Is sericite, common as hydrothermal alteration product or retrograde metamorphism. 8 talc 3SH<5 Natrolite Na2AI 2Si;p 10 •2 H20 Colorless or wt Orthorhombic Vitreous Typically acicular; radiating habit Other zeolites are similar in appearance and occurrence Lining cavities in basalt; with other zeolites.

2. Asymmetrical fold. Limbs dip at different angles. AP is inclined. 3. Overturned fold. Limbs dip in same direction but not same amount. AP is inclined. 4. Recumbent fold. AP is nearly horizontal. 5. Isoclinal fold (Figure 2). Limbs are parallel. AP may have any orientation. 6. Chevron fold (Figure 3). Limbs make sharp, V-shaped juncture at crest and trough of fold. 7. Box fold (Figure 3). Limbs make box-like shape. 2 8. Monocline (Figure 4) . Single limb dips in one direction but with differing amount of dip.

63 s· 8. 72 8. 51 36" 0 12. 92 14. OS 38" 9. IS. 79 21 . 09 14" 24. 40 60. 04 720 9?. 57 74" 96. 44 433. 31 Ill. 60 119. ]7 631. 84 ]8. 62 56. 90 14b. 95 4b. 95 53. 43 so. 45 224. H. Lahee. Copyright (1952) McGraw-Hilt Book Co. ~:l llpe;r~ent an ade 51 52 53 54 55 55 57 58 59 60 61 62 63 64 27°01' 27 28 27 56 28 22 28 49 65 66 67 29 29 30 30 30 31 31 32 32 33 33 33 15 41 07 33 58 23 48 13 37 02 26 49 68 34 13 69 34 36 70 71 34 59 35 22 35 45 45 23 45 24 13 46 24 42 47 48 49 50 25 11 72 25 39 25 06 26 34 73 74 75 36 08 36 30 36 52 76 37°141 77 78 37 36 37 57 79 38 18 eo 85 86 87 88 38 39 39 39 40 4o 40 41 41 89 41 40 90 91 92 93 94 95 96 97 98 41 42 42 42 43 43 43 44 44 44 45 81 82 83 84 l vertical angle 99 11'00 39 00 21 41 01 22 42 02 21 59 19 37 55 14 32 50 07 25 43 00 Conversion from degrees to per cent ot grade per cent grade 10 II 13 I.

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AGI Data Sheets: For Geology in the Field Laboratory and Office by J. Thomas Dutro Jr., Richard Vincent Dietrich, Richard M. Foose


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