Title

Desert Stars -- Strikingly Curious Fe-Oxide Pseudomorphs of the White Desert, Farafra, Egypt

Presenter Information

Stephanie Deters

Department

Geosciences and Geological and Petroleum Engineering

Major

Geology and Geophysics

Research Advisor

Hogan, John Patrick

Advisor's Department

Geosciences and Geological and Petroleum Engineering

Funding Source

National Science Foundation

Abstract

The purpose of this project is to determine the original and current mineralogy of the strikingly curious "Desert Stars" of Farafra, Egypt. The Desert Stars are Fe-oxide pseudomorphs. A pseudomorph is a crystal with the composition of one mineral with a crystal form that mimics a different mineral. The Desert Stars display spectacular crystal forms, including cubic, bladed, and stellate, thus the name Desert Stars. Once the mineralogy of these pseudomorphs has been established the conditions that led to the deposition of the original minerals followed by their replacement by another mineral need to be determined. Polygonal faulting, chalk lithology, and ionized fluids are considered depositional condition factors in Desert Star formation, which need to be investigated in this project.

Biography

Stephanie is a senior in Geology and Geophysics from St. Louis, Missouri. She is President of the C.L. Dake Geological Society and founder of French Club. Stephanie became in involved in this project in Fall 2012, when she was invited to join the Desert Eyes team, a multi-university geology research project in Egypt focusing on structural geology, sedimentology, tectonics, and mineralogy (funded by NSF). Stephanie's area of expertise is in mineralogy, and she will study the stellate crystals.

Research Category

Research Proposals

Presentation Type

Poster Presentation

Document Type

Poster

Location

Upper Atrium/Hallway

Presentation Date

03 Apr 2013, 1:00 pm - 3:00 pm

Comments

Joint project with Reid Herndon

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Apr 3rd, 1:00 PM Apr 3rd, 3:00 PM

Desert Stars -- Strikingly Curious Fe-Oxide Pseudomorphs of the White Desert, Farafra, Egypt

Upper Atrium/Hallway

The purpose of this project is to determine the original and current mineralogy of the strikingly curious "Desert Stars" of Farafra, Egypt. The Desert Stars are Fe-oxide pseudomorphs. A pseudomorph is a crystal with the composition of one mineral with a crystal form that mimics a different mineral. The Desert Stars display spectacular crystal forms, including cubic, bladed, and stellate, thus the name Desert Stars. Once the mineralogy of these pseudomorphs has been established the conditions that led to the deposition of the original minerals followed by their replacement by another mineral need to be determined. Polygonal faulting, chalk lithology, and ionized fluids are considered depositional condition factors in Desert Star formation, which need to be investigated in this project.