Geological Concepts and Terminology

This video tutorial by Blake introduces structural geology, focusing on the lab portion of the course. It covers the orientation of lines and planes in space, using geological methods like strike, dip, trend, and plunge. The tutorial explains compass directions using azimuth and quadrant methods, and includes practice problems for converting between these methods. It also discusses the pitch and rake of lines, providing a comprehensive understanding of geological orientations.

What are the two main components of the structural geology course?

• Lab and lecture

• Theory and practice

• Research and presentation

• Fieldwork and exams

Which method is commonly used in geology to represent compass directions?

• Azimuth

• Polar

• Cartesian

• Cylindrical

In the quadrant method, how would you represent a direction 45° east of north?

• East 45° North

• 45° North East

• North 45° East

• East North 45°

Convert the azimuth direction 095 to a quadrant direction.

• North 5° East

• South 85° East

• East 5° North

• North 85° East

What is the term for the horizontal line at the intersection of a horizontal plane and a plane of interest?

• Trend

• Dip

• Strike

• Plunge

According to the right-hand rule, if your thumb points in the direction of the strike, where does your index finger point?

• South

• Trend direction

• North

• Dip direction

What is the term for the angle between the horizontal plane and the plane of interest?

• Strike angle

• Plunge angle

• Dip angle

• Trend angle

What does the trend of a line represent in geological terms?

• The length of the line

• The depth of the line

• The horizontal projection of the line

• The vertical angle of the line

In geological terms, what is the plunge of a line?

• The angle within the plane

• The length of the line

• The vertical angle from the horizontal plane

• The horizontal distance of the line

What is the pitch or rake of a line?

• The angle within the plane between a horizontal line and the line of interest

• The vertical angle from the horizontal plane

• The horizontal projection of the line

• The length of the line