Monthly Archives: November 2013

Stratigraphy as a Badly-Edited Tape

“The stratigraphic record is like a badly edited tape.” Discuss. The rock record is incomplete. Between limited exposure, erosion, and recycling, only patches are preserved, and deposits of the same age are no longer connected. Particular lithographies can be paired … Continue reading

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Charge-out Rates

For all the black magic voodoo of interpreting geophysical data, the practice of geoscience consulting can be a delightfully straightforward. When figuring out a charge-out rate, professional organizations publish annual fee guidelines depending on the responsibilities of the expected task. … Continue reading

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Sandstone Diagenesis

During diagenesis a sandstone may undergo compaction, cementation and dissolution. Detail these processes and explain why they are important factors that must be considered by petroleum geologists. Diagenesis is the lithification of loose sediment into solid rock through compaction, cementation, … Continue reading

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Day of the Doctor

I peeked at a tiny bit of planetary science, and a whole lot of astronomy and cosmology, in a piece at Physics Today for the Doctor Who 50th Anniversary.

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Accretionary Wedge #61: Geo-jobs!

For October’s Accretionary Wedge, I asked what you did in your geoscience job. Martin Bentley¬†works in a¬†small geotechnical engineering company in South Africa, where he does a lot of borehole logging fieldwork, along with report creation and administration. The Gallivanting … Continue reading

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Sequence Stratigraphy

Describe the sequences as described by Sloss (1963) and discuss the possible controls on their deposition. Sequence stratigraphy is a system of linking unconformity-bounded sediment packages to global events to temporally correlate sedimentary units across lithographic boundaries. This is important … Continue reading

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Geo-Job: On how to be a Geophysicist

I’ve written before about how I love field geophysics, and find the job to be a mix of James Bond villain meets MacGyver. The post has spawned some questions, with emails to me from proto-geophysicists asking how to get from … Continue reading

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Hedgehog Heartbeats

My little hedgehog finds himself carefully quantified as I adore him each night. Heart rate is roughly proportional to animal size: small creatures have fast heart beats, and large animals have slow ones. An often-quoted relationship with no source I … Continue reading

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