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180-Cave Travertine $7.00
Mystery includes rock, fossil, or mineral sample and Mystery questions with teaching instructions.

A sawed slice, or piece of travertine cut or broken across the banding


-- To introduce the rock type, travertine, and its mode of formation in water-filled cavities
-- To introduce the concept of mineral precipitation as one process taking place as part of a vast and dynamic ground water system
-- To discuss the relatively few major ways in which ground water composition can change,
eg. dissolved elemental and gaseous constituents and temperature
-- To discuss the global factors that control the composition of ground water
-- To introduce the notion that the composition of minerals precipitated from ground water can reflect differences in global climate over periods of geologic time

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Ruth Deike
Rock Detective Geoscience Education
395 Deer Run Drive
Nellysford , VA 96080

Phone: 434-263-3737



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