• 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: 7.0 inches (17.78 centimeters)
  • Weight: 5.8 pounds (2631 grams)
  • Collecting Site: Bear Creek/Hwy 360
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old
  • Species: Colinoceras tarrantense
  • Size Diameter: 4.5 inches (11.43 centimeters)
  • Weight: 1.6 pounds (726 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: 7.50 inches (19.05 centimeters)
  • Weight: 5.0 pounds (2268 grams)
  • Collecting Site: Red River Apartments/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: 3.5 inches (8.89 centimeters)
  • Weight: 0.524 pounds (238 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: 3.25 inches (8.26 centimeters)
  • Weight: 0.650 pounds (295 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: 3.0 inches (7.62 centimeters)
  • Weight: 0.512 pounds (232 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: 10 x 7 inches (25.4 x 17.78 centimeters)
  • Weight: 6.0 pounds (2722 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: 3.0 inches (7.62 centimeters)
  • Weight: 0.544 pounds (246 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: 3.0 inches (7.62 centimeters)
  • Weight: 0.434 pounds (197 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: 3.5 inches (8.89 centimeters)
  • Weight: 0.674 pounds (305 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: 5.0 inches (12.7 centimeters)
  • Weight: 1.396 pounds (633.2 grams)
  • Collecting Site: Little Bear Creek
  • Locality: Tarrant County, Arlington, Texas
  • Formation: Tarrant Formation
  • Age: 90-100 Million Years old