Nejapa Tephra: The youngest (c. 1 ka BP) highly explosive hydroclastic basaltic eruption in western Managua (Nicaragua)

Nejapa maar (2.5 x 1.4 km, c. 120 m deep), the largest of 2 prominent maars along the Holocene Nejapa Miraflores Lineament (NML), is the source of a widespread basaltic tephra blanket (Nejapa Tephra: NT) in western central Nicaragua as shown by isopachs and isopleths. The NT, the youngest tephra deposit of the newly defined Nejapa Miraflores Group (NMG), covers an area >10 km² large in western/northwestern Managua. The minimum total magma volume erupted is estimated as >0.1 km³. Juvenile, dominantly slightly vesicular (20-40 vol.%) basically tachylitic cauliflower-shaped lapilli with an average density of 2.1 g/cm³, make up >90 vol. % of the NT, while lithics generally comprise

Product details

• Authors: Juanita Rausch, Hans U Schmincke
• Publisher: Shaker Verlag
• Languages: English
• Product format: Paperback / Softback
• Released: 30.04.2015
• No. of pages: 74
• Dimensions: 149 mm x 208 mm x 7 mm
• Weight: 119 g
• Illustrations: 46 farbige Abbildungen
• Series: Berichte aus der Geowissenschaft; Berichte aus der Geowissenschaft
• Subject: Natural sciences, medicine, IT, technology > Geosciences > Geology