Holocene 4 Lake sediments 4 Secular variations geomagnetic field 4 paleomagnetism 4 secular variation 4 Argentina 2 Geomagnetism 2 Lakes 2 Late Holocene 2 Lithology 2 Palaeomagnetism 2 Paleomagnetism 2 Secular variation 2 South America 2 Stratigraphy 2 Tierra del Fuego [(PRV) Argentina] 2 lacustrine deposit 2 remanent magnetization 2