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Articles from Joseph Kieffer | Selfgrowth.com
- Whistling Stones - by Submitted on Jan 21, 2011 from Joseph KiefferIf a volcano erupts explosively and casts fluid lava high into the air, the lava is dispersed by the wind, giving rise to particles of various sizes from ash to molten blobs of lava up to 15 feet wide called volcanic bombs. Often volcanic bombs are still soft enough to change shape during their ...
Views: 780 - Minerals That Glow In The Dark - by Submitted on Jan 21, 2011 from Joseph KiefferWhen rays from an ultraviolet lamp called a black light strike certain minerals, their atoms become excited (rapidly vibrate) and reradiate energy at a lower wavelength, often providing strikingly brilliant colours. This effect is termed fluorescence, named after the mineral fluorite, which ...
Views: 2117 - ROCKS THAT FOLLOW THE SUN - by Submitted on Jan 12, 2011 from Joseph KiefferHundreds of millions of years ago, single-celled organisms recorded in rock the interactions of the Sun, Earth, and the Moon. Ancestors of blue-green algae built concentrically layered mounds resembling cabbage heads called stromatolite structures by cementing sediment grains together with glue ...
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