Ceaselessly into the past

Today - 27 September 2025 - is exactly 200 years since the first steam-powered passenger hashtagtrain went between Stockton and Darlington. Steam was the power source, but the energy source was coal hashtagand the train industry that quickly spread across the British empire marks the beginning of large-scale coal use. So we are 200 years into the age of coal, about 100 years into the age of oil hashtagand perhaps 75 years into the age of natural gas.

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"So we beat on, boats against the current, borne back ceaselessly into the past"

1934 General Geology Final

Freshman 1934 General Geology class final from The University of Tulsa. Thirty years before plate tectonics. I doubt it was open book.

Geothermal Notes

Updating my geothermal notes to include brine properties up to salinity of 350K ppm, slightly above observed value for Smackover brines in south Arkansas.