Rare Multi-Species Double Fish Fossil Plate Green River Formation 6.75x12” For Sale

• Type: Vertebrate Fossil / Multi-Species Mortality Plate

• Era / Age: Eocene Epoch (~50 Million Years Old)

• Geological Formation: Green River Formation

• Location: Kemmerer, Wyoming, USA

• Species 1: Diplomystus dentatus (Bottom fish with rear-set fins)

• Species 2: Knightia eocaena (Top overlapping fish with centered fins)

• Matrix Size: 6.75 inches x 12 inches x 0.5 inches

• Fish Sizes: Large 8+ inch adult specimens

• Features: Natural Multi-Genus Association, Hand-Prepped Relief Border Frame

🖋️ Item Description

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**Rare 100% Genuine Multi-Species Double Fish Fossil Plate – Wyoming**

Up for sale is an exceptional, fully authenticated double-fish fossil mortality plate from the world-famous Eocene layers of the Green River Formation in Wyoming. This premium collector's specimen dates back approximately 50 million years.

**Why This Specimen is Highly Collectible:**

Unlike standard plates featuring multiple identical schooling fish, this highly unique slab features an overlapping association of TWO COMPLETELY DISTINCT GENERA preserved together:

1. **Diplomystus dentatus (Bottom Fish):** A large adult specimen displaying an upturned surface-feeding mouth profile and characteristic rear-set dorsal fin.

2. **Knightia eocaena (Top Fish):** A jumbo adult ancestral herring showcasing a mid-body centered dorsal fin structure overlapping the bottom fish.

The two fish measure over 8 inches long, representing massive adult size tiers for these Eocene species. The skeletons exhibit exceptional preservation, showing clean vertebral paths, defined ribs, and distinct fin arrangements. The quarry preparer has meticulously hand-chiseled a relief frame border directly around the pair to make the dark organic silhouettes dramatically stand out from the matrix.

**Matrix & Dimensions:**

- Slab Dimensions: 6.75 inches x 12 inches

- Thickness: Approx. 0.5 inches

- Fish Length: 8+ inches

- Weight: Approx. 2 lbs 6 oz (unpacked)

The fossils are set in their genuine, natural gray-cream limestone layer. The slab features a clean, straight-cut presentation with an authentic, naturally flaked reverse side that showcases true sedimentary shale cleavage. It is completely stable and perfect for a high-end display cabinet or shelf easel.

**Condition:**

Excellent structural integrity and remarkable skeletal contrast against the rock matrix. Please review the high-resolution photos to appreciate the intricate bone structures and contrasting fin orientations.

**Shipping Details:**

This item is solid stone. It will be meticulously padded, bubble-wrapped, and securely double-boxed to guarantee an absolute safe arrival. Shipping is calculated automatically via based on package weight and destination.

Buy with absolute confidence—this is a verified, premier-tier multi-species fossil specimen!