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Red beds: Quiz


Question 1: Red beds have economic significance since many of them contain reservoirs of petroleum and ________.
Natural gasEnergy developmentMethaneCoal

Question 2: +________ and neutral-alkaline pH are most commonly found in hot, semi-arid areas, and this is why red beds are traditionally associated with such climates.
CanadaEnglish languageEhUnited States

Question 3: The key to this mechanism is the intrastratal alteration of ferromagnesian silicates by oxygenated ________ during burial.

Question 4: This dehydration or "aging" process is now known to be intimately associated with pedogenesis in alluvial floodplains and ________ environments.
Atacama DesertAntarcticaSaharaDesert

Question 5: Walker’s studies show that the ________ of hornblende and other iron-bearing detritus follows Goldich’s stability series.

Question 6: Berner (1969) showed that goethite (ferric hydroxide) is normally unstable relative to ________ and in the absence of water or at elevated temperature will readily dehydrate according to the reaction:

Question 7: [1] The red color comes from iron oxide in their ________ structure.

Question 8: These include mixed layer clays (illite________), quartz, potassium feldspar and carbonates as well as the pigmentary ferric oxides.

Question 9: A fundamental problem with this hypothesis is the relative scarcity of Permian red colored source sediments to the south of ________.
Greater ManchesterMerseysideCheshireLancashire

Question 10: Although they have been deposited throughout the Phanerozoic, they are most commonly associated with rocks deposited during the ________ and Triassic periods.
Geologic time scalePermian–Triassic extinction eventCarboniferousPermian


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