Lot 168

Green River Formation Fossilized Fish in Matrices

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Green River Formation Fossilized Fish in Matrices

Estimate: $300 - $450

Current Bid: $100

(1 Bid)

by Artemis Fine Arts
August 7, 2026 9:00 AM MDT
Live Auction
686 S. Taylor Avenue
Suite 108
Louisville, CO, US 80027

North America, United States, ca. 53,500,000 - 48,500,000 BCE. North America, Western United States, Green River Formation, Eocene, ca. 53.5 to 48.5 million years ago. A collection of stone matrices each preserving one or more fossilized fish, including multiple examples of Knightia and a rarer Amphiplaga, the largest specimen in the group. Size of largest matrix: 6.2" W x 7" H (15.7 cm W x 17.8 cm H)

Provenance: private Colorado, USA collection

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Item # 202966

  • Condition: The largest fish matrix is repaired from multiple pieces with breaklines and losses as shown. The rest have chips and abrasions, but otherwise well preserved.

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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