Show 10 5 10 15 20 50 100 250 Sort by year (new to old) Actions Download search results Subscribe to news feed Your filters: cql: author="Kleffner, Mark A" or (type exact bookEditor and editor="Kleffner, Mark A") Add to list Journal Article A1 A new, high-precision CA-ID-TIMS date for the ‘Kalkberg’ K-bentonite (Judds Falls bentonite) Neo EB McAdams, Mark D Schmitz, Mark A Kleffner, Jacques Verniers (UGent) , Thijs Vandenbroucke (UGent) , James R Ebert and Bradley D Cramer (2018) LETHAIA. 51(3). p.344-356