Researchers examining Bull Creek at Bull Creek in Northwest Austin find two parallel tracks with one groove wider than the other. The tracks lock into place once in the groove, requiring precise axle turning. A sharp rut runs underneath a rock inclusion, predating the stone erosion. Desiccation cracks suggest these ruts formed in clay or mud then hardened over time. The wagon ruts, documented in a 2024 research study, provide a window into Austin life in the 1800s, likely from traffic coming to and from the mill. Rut widths range 90 to 110 mm (3.5 to 4.3"), with a gauge of 1530 mm to 1570 mm (60 to 62").
Cart rut physical characteristics and formation at Bull Creek
United StatesSurvey
Site mentioned
Key facts
- Two parallel tracks with one making the groove wider
- Cannot be made with standard four-wheel vehicle requiring exact axle turning
- Tracks locked in place once in groove
- Rut goes underneath a rock - appears to be an inclusion in the stone
- Sharp rut exists underneath rock despite cart supposedly bumping over it
- Tracks disappear into deep pool and may reappear on other side
- Top layer of stone eroded away in pool area
- This implies tracks were made before top layer eroded
- Sharp steep rut cut on one side but not another - unexplained
- Hypothesis: rut was cut then later stone eroded away
- Desiccation cracks suggest ruts were made in clay/mud then hardened
- Corresponding rut on other side is shallow
- Evidence of lip coming out of rut - riding on edge of existing rut
Sources
A Characterization of the Cart Ruts in Texas and Azoresresearchgate.net
The cart ruts appear to split into 2 parallel pairs for roughly 4.5 m (5 yd). ... near the cart ruts in Round Rock, Bull Creek, Pico Island, and M ...
'Wagon ruts' at Bull Creek provide window into Austin life in the 1800sfox7austin.com
The “wagon ruts” at Bull Creek in Northwest Austin provide a window into what life was like around Austin in the 1800s.
Mid-1800s wagon ruts preserved at Bull Creek - FOX 7 Austinfox7austin.com
The ?wagon ruts? at Bull Creek in Northwest Austin provide a window into what life was like around Austin in the 1800s.
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