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Baryte in Thin Section

This is a thin section of  radial growths of Baryte (or Heavy Spar).

This slide shows plumose (literally like feathers) interference structure.

In thin-section it is similar to other sulphates but can be distinguished by its straight extinction, moderately high relief, small 2V and paragenesis.

  • Crystals are often intergrown, rosettes, as demonstrated in this TS.
  • Four cleavage directions.
  • Interference colors rangeup to first-order yellow.
  • Sometimes pale colors-brown in PPL with weak pleochroism.

Collected from a mineral vein in the Hope Valley, near Castleton, Derbyshire.

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GEOLOGY OF WHITBY: Why do the East and West cliffs look different?

When you next take a stroll along the Pier at Whitby, stop at the light house, and look back towards the town. You will notice that the cliffs on either side of the pier look very different to each other. Why?

THE EAST CLIFFS

East Cliff

The East Cliffs have lots of horizontal layers of dark and light rock—shales and sandstones.

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Fossil of the week: “Horn Coral”

Heliophyllum (or “Horn Coral”) is an extinct Genus of Coral that existed predominantly in the
Devonian (408-360 million years ago).
This well preserved specimen was found in the beechwood limestone (Clark County, Indiana, USA)

This picture of the Heliophyllum horn coral shows the beaded pattern along its septa lines.

Heliophyllum (Rugosa / Horn Coral) Heliophyllum (Rugosa / Horn Coral)

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Methane clathrate gun fired….

… ammo fil(l)ed and gonna get trigger happy now *excitement*

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SXG390 – the project course!

After a slow start, I’m on a roll…. papers everywhere, highlighters at hand, a small mountain of pens and pencils …. SXG390 success here I come!

Its a strange thing, making “big” decisions regarding the topic – on one hand I am well motivated and fairly certain regarding what I want to look at, and on the other, I feel that I have to complete the research before coming up with the title!  Been on the phone to my (Phd) brother regarding tips in reading, and made many contacts, but at the end of the day, I have to sit down and learn to make efficient notes and not waste time reading fruitless papers!

ho hum…. procrastination needs to come to an end and I had better get back to it!

Herdman Symposium 2014 – Geoscience Frontiers 5 – Saturday 22nd February 2014

Herdman Symposium

I had yet another fantastic day at the Herdman Symposium 2014 yesterday, and left with my head buzzing and longing for more!

A quick overview is below, with some links and recommended reading, is below, and I will delve further into one or two of the subjects at a later date…

 

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Check out new website: 3D fossils – official launch 22/8/13

The GB3D Type Fossils Online project is in the process of developing a database of fossils found in the UK, including links to photographs and a selection of 3D digital models!

 

Examining the ‘Throat of Fire’

AWESOME article from Dave Litchfield: Examining the ‘Throat of Fire’ on the OU Platform!  Read more of his volcanic adventures on his blog!

Check it out!

Watch “Tenerife Field Expedition 2103” I attended on YouTube

My own write up on the Oxford Geology Group to follow!

Quick fix post

My apologies for briefness – time is flying here….

After a wonderful week with the Oxford Geology Group in Tenerife, i’ve been dropped back down to Earth with a thump and am getting very absorbed in work…. and not the geological kind!

There will be some write ups very soon, but to whet your appetite in the mean time, here is a pic of Teide…

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PS aced TMA02 for oceanography so things are looking up there too!