Highland Boundary Fault at Stonehaven

The highland boundary fault is one of the major structural lineations which divides Scotland into 4 major tectonic regions. The HBF is a normal fault on th eNorthern edge of the Midland Valley, with the Highlands to the North. The exposure on the coast here at Stonehaven is particularly good for seeing the structure of the fault, with increasing damage and fracturing of the rocks on either side of the fault as you get closer to th ecore of the fault where most of the displacement occurred. in many faults (particularly smaller faults) the core is filled with weak rock flour, called cataclastite or ultracataclastite, but here many of the fractures are filled with later-stage quartz veins which bond the sides of the fractures together. Because the fracture concentration is highest at the centre of the fault zone, immediately next to the fault core this mineralisation has caused the central fault zone to become stronger than the surrounding rocks so the fault forms a ridge which defines the coast line immediately to the NE of Stonehaven.
See also:
Standing on the Highland Boundary Fault at Conic Hill
• Standing on the Highla...
Paleomovement of the HBF preserved in conglomerates at Conic Hill
• Palaeo-movement of the...
Off-fault deformation below the Moine thrust Ben Arnabol
• Off-fault deformation ...

[@Bacrenfencing]

I fish off the Garron point by boat, some great Cod fishing there !

[@OneMinuteGeology]

Hah, Great! I guess the seafloor is quite rugged off the Point - do Cod like nooks to hide in or are they more open water fish? I remember fishing with my uncle out of Carnoustie as a lad and one side of the boat being super abundant for a spell of half an hour or so, but the other side catching nothing. We assumed the line had found a crevice in the seafloor. But I don't remember what fish we caught.

[@mikelong9638]

Good morning from the USA. Always good to get a short geology lesson with my first cup of coffee! Thanks for making this.

[@OneMinuteGeology]

Good afternoon from Japan, via China! Watch this space for a few non-UK vids in the coming months

[@susanbone3634]

So interesting to find out about this; thank you for making these videos, your observations are always a treat

[@OneMinuteGeology]

Glad you like them.

[@quakekatut8641]

Thanks for another great video fieldtrip! I'm from the Great Lakes region (USA) ... still I find GB geology fascinating. My mother is from Scotland, so maybe there's some geo-gene connection! 🙂

[@OneMinuteGeology]

Cheers, Glad you liked it!