Physical Sciences and Mathematics Commons^™

Evolution Of The Southern Kenya Rift From Miocene To Present With A Focus On The Magadi Area, Alexandria L. Guth

Dissertations, Master's Theses and Master's Reports - Open

The Kenya (a.k.a., Gregory) Rift is a geologically active area located within the eastern branch of the larger East African Rift System (EARS). The study area is located in the southern Kenya Rift between 1° South and the Kenya-Tanzania border (covering approximately 1.5 square degrees, semi-centered on Lake Magadi) and is predominantly filled with extrusive igneous rocks (mostly basalts, phonolites and trachytes) of Miocene age or younger. Sediments are thin, less than 1.5Ma, and are confined to small grabens. The EARS can serve both as an analogue for ancient continental rifting and as a modern laboratory to observe the geologic …

Paleoenvironmental Reconstructions From Cave Sediments Of The Moravian Karst, Czech Republic / By Pavel Sroubek., Pavel Sroubek

Dissertations, Master's Theses and Master's Reports - Open

This thesis presents a paleoclimatic/paleoenvironmental study conducted on clastic cave sediments of the Moravian Karst, Czech Republic. The study is based on environmental magnetic techniques, yet a wide range of other scientific methods was used to obtain a clearer picture of the Quaternary climate. My thesis also presents an overview of the significance of cave deposits for paleoclimatic reconstructions, explains basic environmental magnetic techniques and offers background information on the study area – a famous karst region in Central Europe with a rich history.

In Kulna Cave magnetic susceptibility variations and in particular variations in pedogenic susceptibility yield a detailed …