Data rotations are done to put structural features back to original positions.  In this episode we cover rotating data around vertical or horizontal axes, either parallel with or not parallel with strike, and rotating around an axis off horizontal or vertical.

81) Stereonet Data Rotations

Plotting a linear trend (1:10-2:50), plotting a line on a plane (3:15-4:30), Rake of lineation (4:30-6:25), apparent vs true dip problems (6:25-8:45), intersection line of two planes (8:45-9:20), angle between two planes (9:25-9:55), angle between a plane and a lineation (9:55-11:00), bisecting plane (11:00-12:00)

80) Stereonet Extended Uses

The first section is an overview of drone apps, and you can skip this if not interested to the other more directly appropriate geology apps.

78) Geologic Field Apps

There are many planar and linear measurements, sometimes hundreds, and you need a way to organize all this 3D data.  Stereonets are here to the rescue.

79) Stereonet Basic Use

Using all the concepts we have been covering, we put it all together and use a site in Morrison, CO. to do a complete basic geologic investigation and mapping project.  We also cover the use of Adobe Illustrator to create geologic maps.

77) Full Field Morisson

The procedures for construction, and the items to watch out for when constructing a geologic cross section of the geology below your feet.

76) Geologic Cross Sections

Knowing the original sequence of rocks is essential for unravelling complicated structure.  Having a stratigraphic column of the rocks in your area is a handy reference for the original sequence.  And a Jacob's staff is used to construct such stratigraphic columns.

75) Jacobs Staff and Strat Columns

Once you've planned for your trip, and hit the ground of your field area, how will you conduct yourself to get the most data out of the time you have.

74) Field Geology Strategies

Before heading out to a field site with limited precious time, you should have a bulk of the work done to get the most out of your field experience.

73) Field Geology Preparations

This video covers basic clothing, basic gear (hammer, lens, compass) and more specific gear, and the general importance of maintaining safety in the field.

72) Field  Gear and Safety

This is the best geology podcast out there.  I listen to podcast on my drives out to geologic adventures.  A big thanks for taken the time to produce such high quality podcast that are free for everyone!

Awesome!

Earth Explorations

This is the heartbreaking tale of a geologic hero, who mapped the whole of his country from concepts involving the law of fossil succession, which he showed to be so powerful in organizing rocks in sequence.

46 Fossil succession & Mr. Smith

Here we look into the processes of weathering, erosion, deposition, and lithification.  We examine the agents of erosion, and how this in turn leads to the two types of deposition, which lithify into the two types of sedimentary rocks: chemical and clastic.

31 Sedimentary Rocks Overview

This episode explores as many depositional environments and the general characteristics of the sedimentary rocks that form in them as can be covered in under 15 minutes.  This is also the last episode of sedimentary rocks before we move on to Metamorphic.

37 Depositional Environments

Starting with parent rocks of limestone, dolomite, and sandstone, we see how these mono-mineralic sedimentary rocks can become monomineralic non-foliated metamorphic rocks.  But we will also see that with a bit more chemistry in the minerals and fluids, we can get more varieties of mineral forms.  Marble and quartzite our our star players today.

42 Non-foliated metamorphics

Here we look at the rocks which precipitate from evaporating water, accumulate from organic skeletons, and form from hot fluids both on the surface and underground.

32 Chemical Sedimentary Rocks

A look at the foliated rocks using parental materials of shale and basalt as principal markers for metamorphic grades and zones.  We look into index minerals and general chemistry.

43 Foliated Metamorphics

A closer look at the phaneritic and pegmatitic igneous rocks that crystalize underground

28 Intrusive Igneous Rocks

This episode definitely requires mastery of episode 40, Metamorphic Chemistry 1, to fully appreciate.  Get these two episodes under your belt, and you have a good start on metamorphic petrology.

41 Metamorphic Chemistry 2

A look at the phase rule and it's implications for determining the temperature and pressure levels in a metamorphic rock.  These concepts can be applied to chemical systems beyond metamorphic processes.

40 Metamorphic Chemistry 1

Besides measuring the attitude of rock layers, strike and dip can be used to measure any other planar feature like faults, joints, and foliation.  We here introduce another measurement: dip and dip direction a.k.a. plunge and trend.

71) Strike and Dip - What Can Be Measured

The ductile strain structural forms and low stress brittle strains are seen here with folding, boudinage, and jointing.

69) Folds, Boudinage, and Joints

Avalanches, rock fall, landslides, debris flows, mudflows, and creeping soil are all met in this episode on mass movement.

67) Mass Movement Hazards

Seismic

Seismic waves can be broken into body waves within the Earth and surface waves trapped at the surface.  Body waves can be further broken into P waves and S waves, and the surface waves are further divided into Love and Rayleigh waves.  A full description of each is given here.

59 Earthquake Seismic Waves

Sea floor spreading drives plate tectonics, but what drives sea floor spreading: conveyor belt motion of the asthenosphere, gravity sliding of the ridges, and slab pull at the trenches.

54 Plate Tectonics 4 - Mechanisms

An overview of the theory of Continental Drift with a focus on its promoter Alfred Wegener and his conception of the supercontinent of Pangaea.

51 Plate Tectonics 1 - Continental Drift

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