Graptolites (Lower Ordovician –Lower Devonian) Order Graptoloidea Graptolites (see figures below) are the remains of extinct marine animals that floated about in the early to middle Paleozoic seas. Individual animals

Source URL: www.geology.arkansas.gov

• Hemichordates
• Ouachita Mountains
• Novaculite
• Ordovician
• Clonograptus
• Arkansas
• Geography of the United States
• Graptolithinia