Montemarcello Formation Explained

The Montemarcello Formation is a Late Triassic (Carnian) geologic formation in Liguria, Italy.^[1] Fossil prosauropod tracks have been reported from the formation.^[2]

Description

The formation comprises arenites with a few thin clayey inter-beds. The sands overlie micro-conglomeratic bodies up to 1m (03feet) thick. Two-dimensional ripple marks (with wavelengths of nearly 20cm (10inches)), larger ripples (wavelengths of 120cm (50inches)), interference ripples, and mud cracks were recognized. The arenitic beds are also characterized by internal structures such as accretionary laminae, coalescent bodies, low-angle lamination, and cross stratification. Some arenitic levels are deeply bioturbated, both by simple vertical tubes and by larger horizontal ones. Rare small wood fragments were recognized. Small channels, up to 1.5m (04.9feet) over a very short distance, cut the arenitic bodies.^[3]

Fossil content

The following fossils were reported from the formation:^[1]

• Evazoum sirigui^[4]
• Anomoepus sp.^[5]
• Eosauropus sp.^[6]
• Grallator (Eubrontes)^[5]
• Chirotheriidae indet.^[5]

See also

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with sauropodomorph tracks
    • Prosauropod tracks
• List of fossiliferous stratigraphic units in Italy

References

Bibliography

Notes and References

1. https://paleobiodb.org/classic/displayStrata?geological_group=&formation=Montemarcello&group_formation_member=Montemarcello Montemarcello Formation
2. Weishampel et al., 2004, pp.517-607
3. https://paleobiodb.org/classic/basicCollectionSearch?collection_no=68780 Lerici
4. Umberto Nicosia. January 2003. Triassic Footprints from Lerici (La Spezia, Northern Italy). Historical Biology . 10. 2. 127–140. 10.1080/10420940390256203. 2003Ichno..10..127N .
5. Leonardi, 2000
6. Lockley et al., 2006