The Mineral Chalcedony
Geology / Minerals and Gems
Chalcedony is a catch all term that includes many well known varieties of cryptocrystalline quartz gemstones. They are found in all 50 States, in many colors and color combinations, and in sedimentary continue reading this fact
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The Good, the Bad and the Ozone
Geology / Global Climate Change
Ozone is a big buzz word these days. We mostly hear about the ozone layer, and the importance of protecting it. But if you want to understand what ozone's all about, you need to understand that it can continue reading this fact
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What Causes Ice Ages....Or Global Warming?
Geology / Global Climate Change
We know from the rock record and cores taken from polar ice caps that periods of global cooling (ice ages, or periods of glaciation) have alternated with warmer, more temperate periods having climates continue reading this fact
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