Peat bogs reveal history of atmospheric deposition of lead and other metals



Records of atmospheric lead (Pb) deposition found in peat bogs, lake sediments, and polar ice are remarkably consistent. Each of these archives provides unequivocal evidence of significant anthropogenic Pb deposition extending back at least to Greek and Roman times. The “Roman Pb peak” has now been clearly identified in peat cores from northwestern Spain, Holland, Germany and Switzerland, and as far north as southern Sweden.