Nautiloids - Rayzor Ranch, Denton Co., TX
Kingdom: Animalia, Phylum: Mollusca, Class: Cephalopoda, SubClass: Ammonoidea, Order: Ammonitida
Kingdom: Animalia, Phylum: Mollusca, Class: Cephalopoda, SubClass: Nautiloidea, Order: Nautilida
In Denton County,TX at the Rayzor Ranch, we found several different types of nautiloids and ammonites. First we found Cymatoceras sp, which is a nautiloid. In addition, we found Mariella worthensis (similar to turrilites) of all sizes, up to about 7 inches in diameter and up to 10 inches tall. Their ornamentation is very beautiful and make them very distinctive. We also found Metengonoceras sp fragments in abundance. This is in the Cretaceous Grayson Marl Formation (c. 97mya).
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Mariella worthensis #646
Grayson Marl Formation
Denton Co., TX
Mariella worthensis #646b
Grayson Marl Formation
Denton Co., TX
Mariella worthensis #646d
Grayson Marl Formation
Denton Co., TX
Mariella worthensis #646e
Grayson Marl Formation
Denton Co., TX
Mariella worthensis #646f
Grayson Marl Formation
Denton Co., TX
Mariella worthensis #646g
Grayson Marl Formation
Denton Co., TX
Mariella worthensis #646h
Grayson Marl Formation
Denton Co., TX
Mariella worthensis #646i
Grayson Marl Formation
Denton Co., TX
Mariella worthensis #646j
Grayson Marl Formation
Denton Co., TX
Mariella worthensis #647
Grayson Marl Formation
Denton Co., TX
Metengonoceras #654
Grayson Marl Formation
Denton Co., TX
Metengonoceras #654b
Grayson Marl Formation
Denton Co., TX
Metengonoceras #654c
Grayson Marl Formation
Denton Co., TX
Metengonoceras #654d
Grayson Marl Formation
Denton Co., TX
Metengonoceras #654f
Grayson Marl Formation
Denton Co., TX
Cymatoceras sp #657
Grayson Marl Formation
Denton Co., TX
Mariella worthensis #681
Grayson Marl Formation
Denton Co., TX
Mariella worthensis #682b
Grayson Marl Formation
Denton Co., TX
Mariella worthensis #682
Grayson Marl Formation
Denton Co., TX
Mariella worthensis #683
Grayson Marl Formation
Denton Co., TX
Mariella worthensis #683b
Grayson Marl Formation
Denton Co., TX
Cymatoceras #1053
Grayson Marl Formation
Denton Co., TX
Cymatoceras #1142
Grayson Marl Formation
Denton, TX
Mariella worthensis #1136
Grayson Marl Formation
Denton, TX
Mariella worthensis #1146d
Grayson Marl Formation
Denton, TX
Cymatoceras sp #1053
Grayson Marl Formation
Denton, TX
Mariella worthensis #683c
Grayson Marl Formation
Denton Co., TX
Cymatoceras #1054
Grayson Marl Formation
Denton Co., TX
Cymatoceras #1140
Grayson Marl Formation
Denton, TX
Mariella worthensis #1146
Grayson Marl Formation
Denton, TX
Mariella worthensis #1146e
Grayson Marl Formation
Denton, TX
Mariella worthensis #684
Grayson Marl Formation
Denton Co., TX
Cymatoceras #1146
Grayson Marl Formation
Denton, TX
Cymatoceras #1141
Grayson Marl Formation
Denton, TX
Mariella worthensis #1146b
Grayson Marl Formation
Denton, TX
Mariella worthensis #1146f
Grayson Marl Formation
Denton, TX
Cymatoceras #621
Grayson Marl Formation
Denton Co., TX
Cymatoceras #1143
Grayson Marl Formation
Denton, TX
Mariella worthensis #1129
Grayson Marl Formation
Denton, TX
Mariella worthensis #1146c
Grayson Marl Formation
Denton, TX
Mariella worthensis #1146g
Grayson Marl Formation
Denton, TX