foraminifera test. Marlbrook Marl, Taylor Group, Howard County, Arkansas. X 40. (SEM) . 1 2 A PICTORIAL GUIDE...Cretaceous to Early Middle Eocene. Navarroan Group, Hunt County, Texas. Closeup specimen from the Vincentown Formation...Navesink Formation, Atlantic Highlands, Monmouth County, New Jersey. X 60. (SEM) . 1-4. Pennsylvanian....shows spiraled chambers. Virgilian, Topeka, Shawnee County, Kansas. X 10. 1-5. Pennsylvanian. Fusulina sp...the Middle Pennsylvanian ( Desmoinesian) , Henry County, Missouri. X 17. ( SEM). 1-6. Eocene. Nummulites |