Early Cambrian Ichnofossils from the Mussoorie Syncline and revision of Trace Fossil Biozonation of the Lesser Himalaya, India. (April 2014)

• Record Type: Journal Article
• Authors: Singh, Birendra P.; Lokho, Kapesa; Kishore, Naval; Virmani, Nancy
• Is Part Of: Acta geologica sinica. Volume 88:Number 2(2014:Apr.)
• Page Start: 380
• Page End: 393
• Publication Date: 2014-04
• Subjects: Geology -- Periodicals; Geology -- China -- Periodicals; 551
• DOI: 10.1111/1755-6724.12203
• Languages: English
• ISSNs: 1000-9515

Abstract

<abstract abstract-type="main"> <title>Abstract:</title> <p>A new locality bearing ichnofossils of the <italic>Cruziana</italic> Assemblage Zone‐III from the Mussoorie syncline, Lesser Himalaya, is located in rocks of Member‐B of the Dhaulagiri Formation, Tal Group, exposed along the Maldewta‐Chhimoli fresh road cut section. The site yielded ichnofossils <italic>Bergaueria perata, Cochlichnus anguineus</italic>, ?<italic>Diplocraterion</italic> isp., <italic>Dimorphichnus obliquus</italic>, diplichnitiform <italic>Cruziana bonariensis, Diplichnites gouldi, Glockeria</italic> isp., <italic>Helminthopsis</italic> isp., <italic>Monomorphichnus lineatus, Phycodes palmatum, Palaeophycus striatus, Planolites beverleyensis, Planolites montanus, Treptichnus cf. T. pedum</italic>, scratch marks and an undetermined worm impression. An Early Cambrian age (Cambrian Series 2) is assigned to the ichnofossil‐bearing strata based on the stratigraphic position between the <italic>Drepanuroides</italic> and <italic>Palaeoolenus</italic> trilobite zones. A revised Cambrian ichnofossil zonation is presented for the Tal Group of the Mussoorie syncline. Together with their occurrence on rippled surfaces, and the lateral displacement of some trackways (due to current action), a sub‐aqueous shallow‐marine depositional setting is proposed for the rocks of Member‐B.</p> </abstract>