Tuesday, 14 August 2018

Text books of my youth for sale

Text Books of My Youth Available

A correspondent who may be moving house has some old textbooks looking for a good home.

I remember using some of them when I was a student - I still have my copy of Deer, Howie and Zussman, and I am not parting with that!!!

The books available are:- 

Outline of Hisorical Geology - A.K. Wells - 5th edition - 1966

The Stratigraphy of the British Isles - Dorothy H. Rayner - 1967

An Introduction to the rock forming Minerals - Deer Howie and Zussman - 1967

Geological Structures and Maps - A. Roberts - 1961

Treatise on Sedimentation - William H. Twenhofel - 1962 - Vols. 1 and 2

British Palaeozoic Fossils -1964   )  Both publications of:
British Caenozoic Fossils - 1963  )   British Museum

Geodynamics of Pakistan - Geological Survey of Pakistan - 1979

If you are interested in any of the books, let me know and I will put you in touch with my correspondent.

Extinction wars

Was It the Asteroid: Was It the Deccan Traps?

This long, and well written, article follows an advocate of the Deccan Traps being the cause of the extinction of the dinosaurs on a field trip to India. It describes the disputes she has had with the asteroid backers and the difficulties she has faced - not all of them geological.

The article describes how scientific controversies can become entrenched and embittered.

You can listen to the article using the soundcloud player below



Or you can see it in cartoon form



Saturday, 11 August 2018

13th to 19th August 2018

NEXT WEEKS EVENTS

13TH TO 19TH AUGUST 2018

THE FOLLOWING IS AN EXTRACT FROM BRISTOL AND WEST COUNTRY GEOLOGY CALENDARS

MORE DETAILS CAN BE FOUND IN THE BRISTOL AND THE WEST COUNTRY CALENDARS AND ON THE WEB SITES OF THE RELEVANT SOCIETY OR ORGANISATION.

MENDIP HILLS AONB HAVE A SERIES OF EVENTS WHICH HAVE ONLY RECENTLY COME TO MY NOTICE. THEY CAN BE DISCOVERED HERE. I HAVE INSERTED SOME OF THEM BELOW. VISIT THE WEBSITE FOR BOOKING DETAILS.

MONDAY 13TH

Teme Valley Geological Society - Geological Walk
When
Monday, 13 Aug 2018
Description
 Part of OUGS Symposium–walks around Martley area, examining the geological sites

TUESDAY 14TH

BATTS COMBE QUARRY TOUR – A LIMESTONE LEGACY
August 14 @ 10:00AM - 12:00PM. Also 2:00 pm - 4:00 pm
£5.00
A guided tour with Hanson’s UK to view inside this Burrington Oolite quarry, a mineral very valuable as a pure limestone for animal feed, toothpaste and many industrial fillers. Wear boots, long sleeves, no shorts, safety wear provided.

Meet at Batts Combe Quarry office car park, Warrens Hill, Cheddar, BS27 3LR.Limited places. Charge £5pp.


wednesday 15th


Thursday 16th

Thornbury Geology Group, 7.30pm, The Chantry, Thornbury
When
Thu, 16 August, 19:00 – 21:30
Description
Thornbury Geology Group, 7.30pm at The Chantry, Thornbury, and every 3rd Thursday in the month.  

Friday 17th


saturday 18th

BANWELL BONE CAVES TOUR– “GEOLOGICAL ASPECTS OF BANWELL CAVES AND FOLLIES”
August 18 @ 2:15 pm - 5:00 pm
£15.00
A chance to see early 19th Century follies and pleasure garden with unique bone cave, follies & grottoes not often open to the public.

Banwell Caves, Banwell Lane, BS29 6NA. Limited places, for info contact SESC 01749 840156

£15pp, (children under 16 free), tea/cake available. 

Sunday 19th



Have you heard of the Meghalyan?

Anthropocene vs Meghalayan

You may have heard of the Anthropocene being proposed as a geological time period. But the IUGS (the International Union of Geological Sciences) is having none of that. They say we are still in the Holocene and particularly in the Meghalayan Age.

This has led to a big argument which you can read about HERE. I reckon this will run and run. 

Origin of animals backdated

First Animal Found in Ediacaran?

Stromatoveris psygmoglena is a soft bodied animal found in the Cambrian. Recently many well preserved examples have been found in China. The author of THIS ARTICLE examined them and compared them to Ediacaran fossils and declares them to be the same.

So animal origins go back further than we previously thought.

The comments below the article are worth a look. 

A Cambrian fossil of Stromatoveris from Northwest University, China. J. Hoyal Cuthill

How to date a landslide

Correlating Landslides and Earthquakes in Cascadia

HERE is a longish article about how to date landslides and see whether the landslides are caused by earthquakes. And so far they have not found a landslide with the same age as the great earthquake of 1700.

The technique involves dendrochronology. Trees which died as the result of drowning in lakes formed by landslides are dated and their outermost ring gives the date of the landslide. A rather nice way to get a specific date.


Fig. 1. (left) This slab sample from a drowned tree (visible in the background) in Klickitat Lake in Oregon provides a record of the years before a landslide dam formed this lake, inundating the forest. Slabs with a sufficient number of tree rings can be correlated to regional tree ring records. (right) This correlation is evident from the thinner rings beginning in 1739, shown in this close-up view of tree rings within the slab. Thinner rings document a profound growth slowdown, characteristic of Douglas fir trees throughout Cascadia. The outermost increment that formed immediately under the bark shows that this tree died in 1751. Similar records from other drowned trees could be linked to landslides triggered by great (~M9) earthquake that shook the region in 1700. Credit: Will Struble



Kilauea eruption slowing down?

Kilauea Eruption Slowing Down?

It might be - or perhaps not. Read the speculation HERE.

Lava weakly bubbles from KÄ«lauea’s fissure 8, a significant change from the voluminous lava fountains that had been seen in previous weeks. The photograph was taken during an overflight survey on 7 August. Credit: USGS