Description:

North America, Wyoming, Green River Formation, Eocene Period, ca. 53.5 to 48.5 million years ago. shoal of Knightia fish that fossilized together in what is often called a "life assemblage" because the stone matrix contains a once living community of creatures that died while they were behaving as the normally would - likely hit by a sudden "catastrophic mass mortality" event. Size: 10.3" L x 7.2" W (26.2 cm x 18.3 cm)

Provenance: private Hagar collection, Wildwood, Missouri, USA

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#202202

  • Condition: Irregular shaped peripheries. Losses to surface layers and missing / losses to some fish fossils. Majority of fossils are intact with nice preservation to bone and even some soft tissue.

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April 24, 2026 8:00 AM MDT
Louisville, CO, US

Artemis Fine Arts

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Bid Increments
From: To: Increments:
$0 $299 $25
$300 $999 $50
$1,000 $1,999 $100
$2,000 $4,999 $250
$5,000 $9,999 $500
$10,000 $19,999 $1,000
$20,000 $49,999 $2,500
$50,000 $99,999 $5,000
$100,000 $199,999 $10,000
$200,000 + $20,000