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Geobiology
Last Updated: 2026-06-03 00:07:42
Abstract
We will study traces in the lithosphere that have been left behind by organisms during the course of Earth history and mineral components, which were built through biological processes or used as sources of energy and nutrients by organisms. Traces of life from the past will be compared with the development of the diversity of today's organisms.
Objective
The course will allow you to ask questions about the origin and the evolution of life on Earth, to understand contemporary hypotheses and create new methods of developing them further. Theory is supplemented with observations in the field, exercises and the application of simple mathematical models. The course will enable you to integrate geobiological knowledge into topics that will be taught in subsequent earth science courses and into the current understanding of Earth history. You will learn to better understand modern geological settings and, if necessary, to recommend biogeochemically well-founded and responsible interventions or protective measures.
Content
The course focuses on (a) geobiochemical cycles that play major roles in Earth history in aquatic and terrestrial ecosystems, (b) biosynthetic and metabolic processes, which are essential for life, (c) organisms which regulate and maintain geochemical cycling, and (d) chemical signals of past life in the geological record. Accordingly, we must understand -- how biological cells and its components are built from essential elements and molecules, -- how cells function and which life styles organisms developed, -- where organisms can exist and which factors select for their presence, -- where biologically useable forms of energy come from, and under which conditions they can be exploited, -- how biological metabolism can change environmental conditions and composition, -- which biological products can lead to signals preserved in the rock record, and how biomolecules and elements are altered in sedimentary deposits, -- how organic and inorganic components are cycled through the biosphere, and how biogeochemical cycles function, -- how "biological innovations" evolved and changed in response to environmental changes. Applied Case Studies, which supplement and illustrate the contents: -- Scientific applications of geobiological knowledge are found in fields like Microbial Ecology, Geochemistry, Palaeontology, Sedimentology, Petrology, Ocean Research, Environmental Sciences, Astrobiology and Archaeology. -- Practical applications of geobiological knowledge are needed in fields like stabilisation of existing and design of safe waste repositories, surveilling ground water resources, sewage treatment, exploitation of and prospecting for fossil carbon sources, soil remediation, mineral exploration and leaching, forensic science and medicine.
General Information
- Language
- English
- Levels
- BSC
- Frequency
- Yearly recurring
Examination
- Type
- graded semester performance
- Digital
- The exam takes place on devices provided by ETH Zurich.
Course Components
| Type | Title | Time & Place | Hours |
|---|---|---|---|
| lecture |
Geobiology
Zusätzlich findet eine Exkursion statt.
|
No time listed | 2 h weekly |
| exercise |
Geobiology Exercises
Groups are selected in myStudies.
|
No time listed | 1 h weekly |