• Species: Colinoceras tarrantense
  • Variety: Ammonite Group in concretion
  • Size Diameter: 11.0 inches (27.94 centimeters)
  • Weight: 19.4 pounds (8800 grams)
  • Collecting Site: Little Bear Creek
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • Species: Colinoceras tarrantense
  • Variety: Septarian ammonite with calcite veins
  • Size Diameter: 9.5 inches (24.13 centimeters)
  • Weight: 10.4 pounds (4717.36 grams)
  • Collecting Site: Bear Creek/Hwy 360
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • Note: Very Large Ammonite for this species. 
  • Species: Colinoceras tarrantense
  • Size Diameter: 7.0 inches (17.78 centimeters)  Height : 9.0 inches ( 22.86 centimeters )
  • Weight: 12.6 pounds (5715.3 grams)
  • Collecting Site: Little Bear Creek
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • This Texas fossil shows the septarian features with the calcite veins preserved.  Fossil is exposed on one side of the enclosing concretion.  Fossil stand comes with this ammonite.
  • Species: Colinoceras tarrantense
  • Variety: Brown shelled Septarian Ammonite with Calcite veins 
  • Size Diameter: 8.0 inches (20.32 centimeters)
  • Weight: 6.4 pounds (2903.0 grams)
  • Collecting Site: Bear Creek/Hwy 360
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • Species: Colinoceras tarrantense
  • Variety: Septarian Ammonite with Calcite veins
  • Size Diameter: 9.50 inches (24.13 centimeters)
  • Weight: 9.6 pounds (4355 grams)
  • Collecting Site: Little Bear Creek
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • Species: Colinoceras tarrantense
  • Size Diameter:4.0 inches (10.16 centimeters)
  • Weight: 1.428 pounds (648 grams)
  • Collecting Site: Little Bear Creek
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • Note:  Texas fossil ammonite ( cut & polished ) showing internal chambers.  Stands come with this fossil for both halves.
  • Species: Colinoceras tarrantense
  • Size Diameter:8.0 inches (20.32 centimeters) Overall diameter with calcite veins : 9.5 inches ( 24.13 centimeters )
  • Weight: 8.2 pounds (3719.5 grams)
  • Collecting Site: Little Bear Creek
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • Note:  Texas fossil ammonite that was carefully removed from the enclosing concretion, leaving the septarian calcite veins in-place.  Ammonite has original shell calcite material. 
  • Recommendation :  Hand carry or pickup.  Not able to ship this fossil specimen.  
  • Species: Colinoceras tarrantense
  • Size Diameter: 5.25 inches (13.33 centimeters)
  • Weight: 2.2 pounds (997.9 grams)
  • Collecting Site: Little Bear Creek
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • Ammonite removed from blue/gray concretion. Shell material as a mauve colored calcite material.  
  • Species: Colinoceras tarrantense
  • Size Diameter: 2.0 inches (5.08 centimeters)
  • Weight: 0.175 pounds (80 grams)
  • Collecting Site: Little Bear Creek
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • Note:  Septarian Ammonite with minor calcite veins and mauve shell color.  Strong suture pattern.  
  • Species: Colinoceras tarrantense
  • Size Diameter:5.0 inches (12.7 centimeters)
  • Weight: 1.798 pounds (816 grams)
  • Collecting Site: Little Bear Creek
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • Note:  Texas fossil ammonite showing internal chambers  Stands come with this fossil for both halves.
  • Species: Colinoceras tarrantense
  • Size Diameter:3.5 inches (8.89 centimeters)
  • Weight: .644 pounds (292 grams)
  • Collecting Site: Little Bear Creek
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • Note:  Texas fossil ammonite showing internal chambers  Stands come with this fossil for both halves.
  • Species: Colinoceras tarrantense
  • Size Diameter: 5.0 inches (12.7 centimeters)
  • Weight: 2.0 pounds (909 grams)
  • Collecting Site: Little Bear Creek
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • Ammonite comes with stand.
  • Species: Colinoceras tarrantense
  • Size Diameter: 5.5 inches (13.97 centimeters)
  • Weight: 1.946 pounds (882.7 grams)
  • Collecting Site: Little Bear Creek
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • Fossil comes with display stand.
  • Species: Colinoceras tarrantense fossil group
  • Size Diameter: 5.25 inches (13.34 centimeters)
  • Weight: 1.784 pounds (809.2 grams)
  • Collecting Site: Little Bear Creek
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • Unusal group of fossils.  Two small ammonites, one oyster and a piece of petrified wood.