They look more like Arizona than forested Newfoundland. This is due to the ultramafic rock - peridotite - which makes up the Tablelands. It is thought to originate in the earth's mantle and was forced up from the depths during a plate collision several hundred million years ago. Peridotite lacks the usual nutrients required to sustain most plant life, hence its barren appearance. The rock is very low in calcium, very high in magnesium, and has toxic amounts of heavy metals. Peridotite is also high in iron, which accounts for its brownish colour. Underneath this weathered zone, the rock is really a dark green colour.
Saturday, September 19, 2009
Sept 10, 2009 Day 13
They look more like Arizona than forested Newfoundland. This is due to the ultramafic rock - peridotite - which makes up the Tablelands. It is thought to originate in the earth's mantle and was forced up from the depths during a plate collision several hundred million years ago. Peridotite lacks the usual nutrients required to sustain most plant life, hence its barren appearance. The rock is very low in calcium, very high in magnesium, and has toxic amounts of heavy metals. Peridotite is also high in iron, which accounts for its brownish colour. Underneath this weathered zone, the rock is really a dark green colour.
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Oooo, those mushrooms are so cool! Rachel is very fascinated by them. Her other comments were "Aunt Jennie is working with Grandma in the dirt?" (in reference to the picture of you sitting on the rocks), and "Wow, Aunt Jennie is really cute!"
ReplyDeleteThere you have it. :)
Everything is just as beautiful as I hoped it would be! That bacon and tomato sandwich sounds delicious! Would love one right now. Love Janice & Paul
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