Temporal Changes in Lead Sources, Pettaquamscut River Basin, RI: 19th to 20th Century

Lead in the Environment

It is clear that the sources of lead in the environment have changed over centuries.  Mining/smelting were prominent at first, dating back to the Ancient Egyptians—given these operations were local, associated contamination was proximal to the source. Then as civilization entered the Industrial Age in the 19th Century, coal combustion added another source of lead…

Comments on “High-resolution historical records from Pettaquamscutt River Basin sediments: 2. Pb isotopes reveal a potential new stratigraphic marker”

Gasoline Spills, Lead in the Environment

By Richard W. Hurst Dept. of Geological Sciences, CSU Los Angeles, CA 90032 And Hurst & Associates, Inc. 9 Faculty Ct. Thousand Oaks, CA 91360 INTRODUCTION The paper by Lima et al. (2005) is noteworthy in that the authors utilize the Anthropogenic Lead ArchaeoStratigraphy (ALAS) Model (Hurst, 2000, 2002, and citations therein), as a reference…