Proposing new approaches for dating young volcanic eruptions by luminescence methods

The application of luminescence dating to young volcanic sediments has been first investigated over three decades ago, but it was only with the technical innovations of the last decade that such analyses became viable. While current analytical procedures show promise for dating late Quaternary volcanic events, most efforts have been aimed at unconsolidated volcanic tephra. Investigations into direct dating of lava flows or of non-heated volcanoclastics like phreatic explosion layers, however, remain scarce. These volcanic deposits are of common occurrence and represent important chrono- and volcanostratigraphic markers. Their age determination is therefore of great importance in volcanologic, tectonic, geomorphological and climate studies. In this article, we propose the use of phreatic explosion deposits and xenolithic inclusions in lava flows as target materials for luminescence dating applications. The main focus is on the crucial criterion whether it is probable that such materials experience complete luminescence signal resetting during the volcanic event to be dated. This is argued based on the findings from existing literature, model calculations and laboratory tests.     

Text and Tradition: Justice Scalia’s Consistent Application of His Original Public Meaning Approach to Separation of Powers

In this article, I argue that Scalia consistently and objectively applied his original public meaning approach to preserve separation of powers, ruling both for and against the legislative, executive, and judicial branches when the text and traditional understanding of the Constitution required it. I focus, in particular, on his opinions in Morrison v. Olson (1988), Printz v. United States (1997), Lujan v. Defenders of Wildlife (1992), and Plaut v. Spendthrift Farms (1995), in which he defended executive power and judicial power from congressional encroachments; NLRB v. Noel Canning (2014) and Zivotofsky v. Kerry (2015), in which he defended congressional power from executive overreach; Young v. United States ex rel. Vuitton (1987) and Hein v. Freedom from Religion Foundation (2007), in which he sought to rein in judicial power; and in Talk America v. Bell Telephone Company (2011) and Perez v. Mortgage Bankers Association (2015), in which he sought to reassert judicial power that the Supreme Court in general and he in particular had previously relinquished.     

On the brain and human status

Earl W. Count. Being and Becoming Human: Essays on the Biogram. New York: Van Nostrand Reinhold Co. Behavioral Science Series, 1973. xv + 349 pp. Tables, bibliography, and index. $14.95 (cloth; $6.95 (paper).

Harry J. Jerison. Evolution of the Brain and Intelligence. New York: Academic Press, 1973. xiv + 482 pp. Illustrations, figures, tables, index, and bibliography. $25.00.