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Resurgent Uplift of Samosir Island in Toba Caldera, Indonesia : Insights from Lake Sediment Paleomagnetism and C-14 Age Determination

Creator:

Solada, Katharine

Abstract:

Around 74 ka, a supervolcano, Toba Caldera in Sumatra, Indonesia erupted, producing the Youngest Toba Tuff and its associated caldera. After this catastrophic eruption, a lake filled the caldera, sedimentation within the lake occurred, and the process known as resurgence began. Today, the resurgent dome, Samosir Island, is uplifted 700...

Resource Type:

Masters Thesis
Environmental Magnetism as a Proxy for Heavy Metal Concentrations at Formosa Mine Superfund Site

Creator:

Upton, Tullia L.

Abstract:

Environmental magnetic techniques have been used to discriminate sources of sediments from a variety of natural and anthropogenic sources. In many studies, magnetic properties such as susceptibility, have served as a proxy for heavy metal concentrations. In these cases, there tends to be enhancement of magnetic minerals. The study presented...

Resource Type:

Masters Thesis
Practical Advances in Sediment Core Magnetic Susceptibility Data Logging for the Field and Laboratory

Creator:

Konyndyk, David M.

Abstract:

Magnetic susceptibility (MS) is a measure of a sample material's ability to be magnetized by an applied magnetic field. Applied to sedimentology, it provides us with a proxy indicator for the concentration of magnetizable minerals present at each depth. This knowledge, in conjunction with directional magnetic alignment data, climatic histories,...

Resource Type:

Poster