Structural Geology

Course objectives

Educational goals: The Structural Geology course is focused on the characterization of geometry, kinematics and mechanics of the deformed geological structures. During the course we spend considerable time developing a sense of the importance of a careful geometrical characterization of the deformed structures. Students are forced to think about the data needed to solve structural problems, and about how to plot and interpret data, use equations to solve simple mechanical models and to organize the results in a presentation that can be useful for other people. This exercise helps students to develop problem-solving skills that solidify their understanding of important equations and processes, as well as prepare them to do well in the exams. The main topics of the course are: Strain, Folds, Stress, Rock Mechanics, Fault Rocks and Shear Zones. Learning outcomes: At the end of the course the students will be able to answer questions such as where are the structures located in the rocks? How are they oriented in space and with respect to one another? What are their characteristics? These observations are vital for structural geology because they represent the starting point that guides the formulation of kinematic and mechanical models.

Channel 1
SABINA BIGI Lecturers' profile

Program - Frequency - Exams

Course program
PART I Concepts of brittle (from fracture to fault, deformation at low temperature and pressure, earthquakes) and ductile (deformation by ductile flow, folds, deformation at high temperature and pressure) deformation. The rheological profiles. The depth of the brittle-ductile transition. Strain. Strain in 2D and ellipse of strain. Deformation of variously oriented objects. Strain in 3D and strain ellipsoid. Analysis of strain in 2D and 3D. Fractures, joints and veins. Definitions and relationships with other structures. Practical applications to civil engineering, to surface geology, to oil and ore geology. An introduction to ductile deformation. Main structures at meso and microscales. Folds: classification, mechanisms of folding and their geological and economic importance. Ductile shear zones. Foliations and lineations. PART II Stress: The principal stress. Fracturing and faulting. The Coulomb law. Andersonian systems. Role of the fluid pressure. Concepts of internal friction and yield stress. Faults: Terminology. Different kind of fault rocks in brittle and ductile fields. Kinematic indicators. Normal, reverse and transcurrent faults. Thrusts. Brittle fracture zones.
Prerequisites
ability to recognize common (sedimentary, igneous and metamorphic) rocks.
Books
Fossen, Geologia Strutturale, Zanichelli, 478 pp. 2020. Twiss and Moores, Structural geology, Freeman and Company, New York, 532 pp., 2000. Ramsay & Huber, Modern structural geology, Strain Analysis Vol. I, Academic Press, London, pp. 0-308, 1983. Ramsay & Huber, Modern structural geology, Folds and fractures, Vol. II, Academic Press, London, pp. 309-700, 1987.
Teaching mode
lessons in class
Frequency
attendance is suggested lessons can be attended at link https://meet.google.com/pcr-ekjf-gze
Exam mode
the course provedes two possibilities: 1 - two examination (one for each part of the course) at the end of each part. the final evalutaion will be the average of the two examinations. 2 - an oral final examination
Bibliography
Fossen, Geologia Strutturale, Zanichelli, 478 pp. 2020. Twiss and Moores, Structural geology, Freeman and Company, New York, 532 pp., 2000. Ramsay & Huber, Modern structural geology, Strain Analysis Vol. I, Academic Press, London, pp. 0-308, 1983. Ramsay & Huber, Modern structural geology, Folds and fractures, Vol. II, Academic Press, London, pp. 309-700, 1987.
Lesson mode
lessons in class
  • Lesson code1022616
  • Academic year2025/2026
  • CourseGeological Sciences
  • CurriculumSingle curriculum
  • Year3rd year
  • Semester2nd semester
  • SSDGEO/03
  • CFU6