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LOT 2788
Fossil Phacops Trilobite on Matrix
DEVONIAN PERIOD, CIRCA 444-439 MILLION YEARS B.P.
4 3/8 in. (302 grams, 11.3 cm).
The aquatic arthropod showing good detail in the carapace, resting on an irregular matrix. [No Reserve]
ProvenanceFrom Morocco, North Africa.
From a Cambridgeshire, UK, collection.
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AUCTIONS:
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Cut and Polished Agate Geode Slice Group
Sold for (Inc. bp): £26
Comprising six translucent slices showing red, orange and grey banding together with colourless quartz crystal formations. 392 grams total, 13.2-13.8 cm
Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
![Group of Ten [10] Cut Malachite Slabs](https://timelineauctions.com/upload/images/items/small/251017-s.jpg)
Group of Ten [10] Cut Malachite Slabs
Sold for (Inc. bp): £26
Comprising ten irregular sections showing contrasting light and dark banding on both sides. 1.21 kg total, 7-18.5 cm
Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
Fossil Knightia Fish in Matrix
Eocene Period, circa 58-36 million years B.P.Sold for (Inc. bp): £91
A Knightia alta fish on a rectangular limestone matrix. 589 grams, 17.8 cm
From a Cambridgeshire, UK, collection.
In southwest Wyoming (and parts of Colorado and Utah) in the Green River Formation are found some of the world's most outstanding specimens of fossil fish. The Green River system was composed of three lakes: Lake Ulinta, Lake Gosiute and Fossil Lake. These Eocene lakes lay in a series of intermountain basins formed by geological events that uplifted the Rocky Mountains during the early Tertiary time. The climate was much different from the desert-like climate of this area today. Both the fauna (crocodiles, alligators, boa constrictors and some subtropical fish families) and the flora (such as large palm trees) indicate a climate much like that found along the Gulf Coast today. Large amounts of ash found in the sediments indicate that volcanoes were particularly active at this time.
