UGA Stratigraphy Lab

The data is in the strata

• UGA
• Geology Dept.
• Stratigraphy Lab
• Steven Holland

• Online Guide to Sequence Stratigraphy
• Software
• Cincinnatian Fossils
  and Stratigraphy
• Nashville Fossils
  and Stratigraphy
• Ordovician Sequence Stratigraphy
• Tools for Fieldwork
• Graduate Studies
• Personnel

Tools for field work

Note-taking forms (pdf files)

• Lithologic log: use for measuring and describing stratigraphic sections
• Lithologic log, with pale green grid: like the form above, but with a pale green grid to aid in aligning notes with the measured section
• Faunal log: use for recording the changing abundance and distribution of fossils within a stratigraphic section
• Faunal tally: use for making counts of faunal abundances within stratigraphic units
• Locality: use for recording locality information, such as geographic location and stratigraphic interval
• Notes: use for taking general notes

Estimating true thickness of covered intervals where outcrop is oblique to dip

1) Measure the true strike of the strata (θ_strike)

2) Measure the true dip of the strata (δ)

3) Measure the azimuth of the road (θ_road)

4) Calculate the angle (β) between the road and the strike of the strata as β = | θ_road - θ_strike |

5) Calculate the apparent dip (α) of the strata along the road as α = arctan [sin(β) ⋅ tan(δ)]

6) Measure the apparent thickness (t) of the covered interval along the road using a Jacob staff set to the apparent dip of the strata along the road (α)

7) Calculate the true thickness (T) of the covered interval as T = t ⋅ [cos(δ) / cos(α)]

Comments or questions? Please contact Steven Holland at stratum@uga.edu

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