TEST YOUR KNOWLEDGE Answers on Page 36
Robert G. Font, CPG-03953
robertfontphd@gmail.com
1. This attractive pink or reddish “sorosilicate” mineral is also Norway’s national gemstone:
a) (Ca,Mn)2Al3(SiO4)(Si2O7)O(OH). b) (Mn,Fe,Mg,Ca)SiO3. c) Mg3Al2(SiO4)3. d) KAlSi3O8. e) Dont2know3dude4.
2. We define the “bulk modulus” as: a) The ratio of stress over linear strain or a measure of stiffness of a solid material: .
b) A measure of geometric change of shape:
c) The ratio of stress over volumetric strain or a measure of resistance to compression;
d) The quantity represented by the equation . e) A contraption that measures how fat we are.
3. In modern-day discussions of continental crust formation at arcs, it has been postulated that a parental mostly mafic magma may differentiate into a mafic garnet pyroxenitic cumulate and a complementary silicic melt. In this model, the former (due to its high density) “delaminates” into the mantle while the latter remains as the actual “crust.” What term best defines the mafic garnet pyroxenitic residue involved in the “delamination” process?
a) Migmatite. b) Arclogite. c) Anorthosite. d) Tonalite. e) Magmarctite.
4. In our studies of geophysics, the following decomposes a signal into its constituent frequencies (e.g., a waveform into its sine and cosine components):
a) Laplace’s equation. b) Fourier transform equation. c) Reynolds equation. d) The Zoeppritz equations. e) Old dude says: Man, I couldn’t even learn to use the slide rule! Young dude says: What the heck is a slide rule?
5. The following describes a plant-eating, beaked, ornithischian dinosaur of Late Jurassic time: a) Camptosaurus. b) Apatosaurus. c) Camarasaurus. d) Ceratosaurus. e) Dude, I am not into dinosaurs; slimy invertebrates rule!
34 TPG •
Apr.May.Jun 2021
www.aipg.org
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