TEST YOUR KNOWLEDGE Answers on Page 36
Robert G. Font, CPG-03953
rgfont@cs.com
1. The eruption of this volcano gave rise to the “year without a summer” and it is considered to have inspired Mary Shelley in the writing of her novel “Frankenstein”:
a) Tambora, 1815. b) Mt. Pelée, 1902. c) Krakatoa, 1883. d) Nevado del Ruiz, 1985.
2. Which of these metamorphic rocks is generally a product of contact metamorphism? a) Hornfels b) Granite Gneiss c) Slate d) Dude, I don’t study metamorphism. Melt everything, I say!
3. In structural geology, this equation, when expressed in terms of the Airy stress function, provides a method for finding systems of stresses which automatically satisfy the equations of equilibrium and compatibility equation. Thus, it may be used to determine major and minor principal stress trajectories and related fault geometries:
a) The biharmonic equation. b) Laplace’s equation. c) Boyle’s equation. d) Man, FYI, I don’t like equations! They are ugly, with symbols, numbers, letters…
4. A subareally-exposed marine clay has a natural water content (Wn) of 32%, liquid limit (LL) of 21% and plastic limit (PL) of 15.8%. What is the clay’s “liquidity index” (LI) and what would you suspect about this lithology?
a) LI = 1.9; the clay is rich in “smectite.” b) LI = 2.5; the clay is “over-consolidated.” c) LI = 3.1; this is a “quick clay.” d) No clay for me, hombre; I’m a sand person myself. Give me the beach!
5. (Question by David M. Abbott, CPG-04570). The numbering of sections in a township begins in: a) The northeast corner of the township. b) The northwest corner of the township. c) The southeast corner of the township. d) The southwest corner of the township.
34 TPG •
Jul.Aug.Sep 2018
www.aipg.org
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