Chris Harlow

Ageing (ex) geologist

[Chris Harlow @ChrisHa82353804]

@FossilLocator Nice carving!

[Chris Harlow @ChrisHa82353804]

@ScottishAgates A beauty

[Chris Harlow @ChrisHa82353804]

@brendamcdnot56 @STVNews No. They will blame Westminster!

[Chris Harlow @ChrisHa82353804]

@scillybirder @ScottishAgates Because the local rocks are andesite and basalt lavas (Montrose Volcanic Group, Early Devonian) that contain the agates. They can be found on the beach, in rock outcrops along the coast and in farmers fields after ploughing

[Chris Harlow @ChrisHa82353804]

@AgateScotland Not so sure about the ‘esteemed’ bit!

[Chris Harlow @ChrisHa82353804]

@palaeokatie Interesting. What do you think the original Jasper hosting rocks were and where are they now?

[Chris Harlow @ChrisHa82353804]

@palaeokatie Some of those that come out of the East Scotland conglomerates also take a nice polish

[Chris Harlow @ChrisHa82353804]

@FossilLocator So if it has the hardness of Sapphirine (7 1/2) and sg of Sapphirine (3.4 - 3.5), why is it not Sapphirine?

[Chris Harlow @ChrisHa82353804]

@ScottishAgates This is a real cracker. Escape structure madness!

[Chris Harlow @ChrisHa82353804]

@vee_mikee @GeologyTime ‘Citrine’ can be created by heat treating amethyst. However, the size and shape of this crystal suggests that it is irradiated smoky quartz. The radiation treatment produces a lemony green colour. The choice of photo background may not be coincidental …

[Chris Harlow @ChrisHa82353804]

@ScottishAgates Oof.

[Chris Harlow @ChrisHa82353804]

@ScottishAgates Edinburgh? Any more specific?

[Chris Harlow @ChrisHa82353804]

@palaeokatie

[Chris Harlow @ChrisHa82353804]

@mickymicky06s Different. But heat would still move from the interior to the surface and there would still be convection. So still huge forces and stresses involved. There would still be volcanoes and there would still be earthquakes - probably less frequent but more violent.

[Chris Harlow @ChrisHa82353804]

@palaeokatie Somehow, the terms ‘tropical’ and ‘Loch’ do not go well together 😂

[Chris Harlow @ChrisHa82353804]

@SkyeMcDavid @FossilLocator I think that you will find the origins of pizza, and certainly the best, in Italy.

[Chris Harlow @ChrisHa82353804]

@FossilLocator Scottish Agate, Montrose area. Self collected, cut and polished and photographed.

[Chris Harlow @ChrisHa82353804]

@micwoodward Well don’t forget a day or find yourself somewhere with no internet access, because the streak ends if you miss a day.

[Chris Harlow @ChrisHa82353804]

@GawenJenkin Ask what you actually get for your subscription. Is it good value? Start at the top …

[Chris Harlow @ChrisHa82353804]

@palaeokatie By all means express your views. But it would help to put the politics and geology in separate tweets. Those interested in the geology can respond to one and those into politics the other.