Introduction: Bob, Louise and I took an EVA returning to the northern stream field 2.5km to the north. There we collected many fossil samples.

Geological Description: Outcrops along the stream show a transition of late Jurassic Morrison Formation to Cretaceous Dakota Formation. Dakota Formation unconformably overlies Morrison Formation.

Sample List:

• Locality: UTM 0517.08E 4253.28N (waypoint 106)
  Rock type: Conglomerate, pebble size 0.2-1.5cm, gray silt matrix
  Gryphaeidae ("devils' toenail" oyster)
  unidentified microfossils
  
  
• Locality: UTM 0517.40E 4253.87N
  Rock type: Conglomerate, pebble size 0.2-1.5cm, gray silt matrix
  Gryphaeidae
  
  
• Locality: UTM 0517.81E 4253.43N (waypoint 105)
  Rock type: Black Shale
  unidentified Mollusca
  unidentified microfossils

Conclusion: Numerous Gryphaea fossils were found at various locations in Mid-ridge area. We continue paleobiological and stratigraphical study.