Jonathan Harvey
@jonomtdoom.bsky.social
Science, Geology, Volcanology, Geochemistry, Meteorites.
Sci Fi fan, Anime and Fantasy, Tolkien.
Birder and all things nature.
Somerset.
Sci Fi fan, Anime and Fantasy, Tolkien.
Birder and all things nature.
Somerset.
You can only make the best statues out of baked limestone.
August 14, 2025 at 6:29 PM
You can only make the best statues out of baked limestone.
Dartmoor, Hay Tor, some rather splendid megacrystic alkali feldspars in th4e granite that are very visible on the highest part of the Tor.
August 3, 2025 at 1:27 PM
Dartmoor, Hay Tor, some rather splendid megacrystic alkali feldspars in th4e granite that are very visible on the highest part of the Tor.
Jurassic Coast, near Lyme Regis, Pinhay Bay, a dewatering structure, at the top of the white lias beds, one of many along the same bed, potentially caused by a seismic event whilst sediment still had a lot of water in.
July 14, 2025 at 10:52 AM
Jurassic Coast, near Lyme Regis, Pinhay Bay, a dewatering structure, at the top of the white lias beds, one of many along the same bed, potentially caused by a seismic event whilst sediment still had a lot of water in.
Intriguing Svartsengi GPS monitor graph showing quite a steep incline on the upwards ground movement graph, is there a steady magma inflow into an inflating magma chamber that slows when getting pressurised or is there an increased pulse of magma entering the chamber?
May 1, 2025 at 4:48 PM
Intriguing Svartsengi GPS monitor graph showing quite a steep incline on the upwards ground movement graph, is there a steady magma inflow into an inflating magma chamber that slows when getting pressurised or is there an increased pulse of magma entering the chamber?
Fascinating initial Svartsengi GPS readings after the april 1st dike intrusion, a steep rise, could be just upset by intrusion or maybe a sign of increased magma flow from deep, time will tell.
April 8, 2025 at 10:54 AM
Fascinating initial Svartsengi GPS readings after the april 1st dike intrusion, a steep rise, could be just upset by intrusion or maybe a sign of increased magma flow from deep, time will tell.
A spectacular EQ swarm prior to todays eruption in Iceland just north of the town of Grindavik, the EQs clearly mapping the line of the fissure.
April 1, 2025 at 6:55 PM
A spectacular EQ swarm prior to todays eruption in Iceland just north of the town of Grindavik, the EQs clearly mapping the line of the fissure.
The De le Beche angular unconformity at Varis Vale, east Somerset, flat beds of middle jurassic inferior oolite sit on top of planed off steeply dipping carboniferous limestone.
March 22, 2025 at 11:06 PM
The De le Beche angular unconformity at Varis Vale, east Somerset, flat beds of middle jurassic inferior oolite sit on top of planed off steeply dipping carboniferous limestone.
Iceland, GPS station at Svartsengi shows land is still rising, but no eruption (yet).
March 11, 2025 at 12:11 PM
Iceland, GPS station at Svartsengi shows land is still rising, but no eruption (yet).
East Harptree Combe, so many ash trees down it looks like a tornado has passed through. Some good outcrops of Triassic dolomitic conglomerate still accessible though.
March 2, 2025 at 7:49 PM
East Harptree Combe, so many ash trees down it looks like a tornado has passed through. Some good outcrops of Triassic dolomitic conglomerate still accessible though.
i see your orbicular granite, i raise you an orbicular diorite, NHM, London.
February 24, 2025 at 10:43 AM
i see your orbicular granite, i raise you an orbicular diorite, NHM, London.
First ST episode i remember (seen every ep since) was the original pilot episode The Cage.
February 24, 2025 at 12:24 AM
First ST episode i remember (seen every ep since) was the original pilot episode The Cage.
The Icelandic Svartsengi GPS online graph is showing the vertical land rise has reached the level at which the last eruption in November occurred. As yet, no new eruption.
February 18, 2025 at 11:17 AM
The Icelandic Svartsengi GPS online graph is showing the vertical land rise has reached the level at which the last eruption in November occurred. As yet, no new eruption.
Iceland: IMO have released an update that includes this graph, suggesting that the volume of magma under Svartsengi has now reached the minimal required to trigger an eruption based on modelling.
February 2, 2025 at 3:18 PM
Iceland: IMO have released an update that includes this graph, suggesting that the volume of magma under Svartsengi has now reached the minimal required to trigger an eruption based on modelling.
Ive seen this mosaic in Taunton Museum, its next to the fossil collection, its quite spectacular.
January 2, 2025 at 9:30 AM
Ive seen this mosaic in Taunton Museum, its next to the fossil collection, its quite spectacular.
Thanks for that, its an interesting site. I was struck by the internal design and those amazing romanesque arches, i was never sure whether they were original Norman constructs or later additions, have you anything on that?
December 29, 2024 at 3:37 PM
Thanks for that, its an interesting site. I was struck by the internal design and those amazing romanesque arches, i was never sure whether they were original Norman constructs or later additions, have you anything on that?
Annual Somerset traditional carnival this evening in Glastonbury, floats as spectacular as usual despite the slightly soggy weather.
November 16, 2024 at 11:17 PM
Annual Somerset traditional carnival this evening in Glastonbury, floats as spectacular as usual despite the slightly soggy weather.
Somerset, Sand Point, Middle Hope bay, these Carboniferous volcaniclastic deposits are interesting, some fair size blocks here, up to about 25cm.
October 5, 2024 at 12:11 PM
Somerset, Sand Point, Middle Hope bay, these Carboniferous volcaniclastic deposits are interesting, some fair size blocks here, up to about 25cm.
Some interesting layering in the ashy limestone and what looks like bioturbation in the rocks at Sand Point, Middle Hope, Somerset, this bit near the top of the ash deposit on the eastern part of the bay. Can anyone say what made this?
October 5, 2024 at 11:56 AM
Some interesting layering in the ashy limestone and what looks like bioturbation in the rocks at Sand Point, Middle Hope, Somerset, this bit near the top of the ash deposit on the eastern part of the bay. Can anyone say what made this?
Latest GPS monitor at Svartsengi, Iceland, shows a bit of an interesting kink in the trend of ground inflation. It could just be a data recording issue.
July 19, 2024 at 5:27 PM
Latest GPS monitor at Svartsengi, Iceland, shows a bit of an interesting kink in the trend of ground inflation. It could just be a data recording issue.