Natural History - Large Cut and Polished Agate Crystal Geode Slice

A rectangular sedimentary matrix displaying at least four fossil Knightia sp. fish. 624 grams, 16 cm



Ex Lincolnshire, 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.

A Nantan meteorite classified as an iron meteorite; 111CD Course Octohedrite, approximately 92% iron, 6% nickel and with more than ten minerals including kamacite, taenite, dominate, plessite, scheribersite, triolite, graphite and others; accompanied by a information slip: 'Nantan Meteorite / The meteorite is from the witnessed fall in Guangxi, China in 1516 AD. 'During summertime in May of Jiajing 11th year, stars fell from the northwest direction.... waving like snakes and dragons. / 4 Billion years old. Struck earth in the 16th Century.' 13.3 grams, 36 mm



Acquired UK, 2020. Property of a Sussex, UK, teacher. Accompanied by an information slip.

The Nantan meteorite fell in 1516 as recorded in ancient Chinese texts. The fireball exploded during descent which resulted in the shower of many individual iron meteorites over an area 28km x 8km in Nandan County, Guangxi, China.

An unpolished, cut banded amethyst crystal slab; '52' inked to one face. 1.9 kg, 25 cm



Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's).