~30 million year old leaf impression fossils of plants from the Rujada Flora from a forest roadcut through the Fisher Formation near Cottage Grove, Oregon. Specimens include leaves of sumac (Rhus varians), alder (Alnus carpinoides), tanoak ( Notholithocarpus simulans), and dawn redwood (Metasequoia occidentalis)! The Oligocene (~30 Ma) Rujada flora (42 spp.) and the nearbyContinue reading “What a shock! That plant is locked in a rock.”
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Fascinating fossils
A few specimens acquired in the Amadeus Basin, near Alice Springs, Northern Territory, Australia, and range in age from ~380 Ma – 1 Ga.
Searching for signs of life in ancient Mars soils
Adrian Broz, Greg Retallack, Briony Horgan, Lucas Silva, and Matt Polizzotto Sequence of ~33 million year old clay-rich fossil soils (paleosols) at the Painted Hills, John Day Fossil Beds National Monument, Oregon (Photo: Jamie Francis). These paleosols are similar in mineral composition (lots of hydrated clays) and stratigraphic distribution to clay-rich areas on Mars atContinue reading “Searching for signs of life in ancient Mars soils”
Ten reasons why soil matters to you
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The wonderful world of science at Swanton Pacific Ranch
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What exactly does a soil scientist do?
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Soil lamellae!
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Planetary Soils 