Upper Jurassic radiolarians from the Naga Ophiolite, Nagaland, northeast India

Radiolarians, extracted from cherts collected from an ophiolitic mélange near Salumi, Nagaland, NE India, have well-preserved tests and can be assigned to the Upper Jurassic (Kimmeridgian–lower Tithonian). These are the first well-preserved and clearly imaged radiolarians reported from the Naga Ophiolite. They are significantly older than fossils previously reported from this mélange, and their ages are similar to those determined radiometrically from associated igneous units.

Graphical AbstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights► First well-preserved identifiable fossils from ophiolitic mélange Nagaland, NE India. ► Upper Jurassic (Kimmeridgian–lower Tithonian) age. ► Significantly older than fossils previously reported.