While headed for the California Gold Rush of 1849, George Giggey (who was my great-great-grandfather) first made his way through the mountainous and untamed wilderness of what would later become Colorado. He was among a […]
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Category: geology
‘Finders, keepers’: the lost world of some Isle of Wight geological heroes
There is a growing misconception that most of the earliest important fossil discoveries were made by a select few famous geologists – established names, who were supposed to have ‘found’ everything in their collections. In […]
Carbonate platforms and coral reefs: the Coralline Oolite Formation of the Yorkshire Upper Jurassic – a prime source of palaeontological information
The Malton Oolite Member of the Coralline Oolite Formation (Corallian Group), as exposed in the Betton Farm South Quarry (TA00158555) at East Ayton, near Scarborough (Fig. 1), provides a wealth of fascinating palaeontological and sedimentological […]
The Dendermonde Mammoth: fighting pyrite decay and the preservation of unique paleontological heritage
Collecting fossil vertebrates is rather popular among amateur palaeontologists. However, little interest is shown in the different stages one should undertake to treat and safely guard these specimens for the future. Loads of fossils from […]
Urban geology: gabions in the Dutch townscape
Gabions are tools of the engineering geologist, facing elements that are used to stabilize over-steep slopes, such as sea cliffs or railway/roadway cuttings; they also have military applications. The word is derived from the French, […]
Folklore of fossil molluscs
The final article of this series on fossil folklore focuses on molluscs, excluding the ammonites, which were covered earlier (see Fossil folklore: ammonites in Deposits, Issue 46, pp. 20–23). Molluscs are second only to arthropods […]
Carrara marble from the Apian Alps – another famous ancient workable stone
This is the last in a series of four articles I have written on the quarries and marble of the ancient world and the works of art made from it. The others (Mining in Ancient […]
Wieliczka Salt Mine of Poland part-2
This the second of two articles on the Wieliczka Salt Mine in Poland. The first appeared in Issue [51] and covered some of the highlights that can be seen there. This one covers some more […]
The Wieliczka Salt Mine of Poland: part-1
The Wieliczka Salt Mine of Poland was included in the first UNESCO World Heritage list in 1978. It is also on the Polish List of Historic Heritage and, when visiting, provides an interesting way to […]
One way to ‘collect’ a massive specimen: simple photogrammetry in the field using a mobile phone
Inspired by the recent excellent series of articles by Trevor Watts discussing the types of Mid-Jurassic dinosaur footprints to be found along the Whitby coast (Deposits, Issues 46, 47, 48 and 49), when recently working […]
Pallasites: the meteorite jewels in the crown
Perhaps unsurprisingly (as a professional dealer in space rocks), I find all meteorites equally fascinating and, in their own way, aesthetically appealing. However, I have to admit, the meteorites known as the Pallasites, with their […]
Urban geology: the Worsley Park wall game, Manchester
Wall games are a very geological form of light entertainment and education. I certainly have amused myself by identifying rocks and their features in walls since my days as an undergraduate and before. I was […]
Fossil fish from the north of Scotland
The north of Scotland is famous to scientists and amateur collectors for its wealth of localities where fossil fish of Devonian age can be collected. From plate tectonics, we know that in Devonian times Scotland […]
Great Plains geology – a personal journey
I grew up in the 1940s and 50s in the eastern US state of Maryland and went to cinemas on my own from the age of six, mostly to see what were then to me […]
Agate: a mineral that develops with age, water and moganite
Agate is banded or variegated chalcedony and this distinctive appearance allows a ready identification from any source. Many agate thick sections from basic igneous hosts are reminiscent of a series of distorted onion-like rings with […]
A pale white dot
“There’s nothing new under the sun” goes a famous saying and these words are very apt when trying to understand Earth’s climate trends. Thanks to numerous discoveries made about Earth’s ancient past, we now know […]
What’s so special about South Devon?
Take a trip to the South Devon coast around Easter time and you are bound to come across student parties from universities engaged in fieldwork. What is it about this area that makes it so […]
Siri Scientific Press: A UK-based publisher specialising in palaeontology
I have written this article as a summary of how I established myself in the fossil publishing business because it might be of interest to a general readership. First, a little background about myself is […]
The Anthropocene: should we designate a new epoch? A geologist’s perspective
Whatever your views, this is a subject that will not go away, and the concept of the Anthropocene is gaining more impetus and consideration as time goes by. In a nutshell, the Anthropocene has been […]
The Jurassic Coast (or is it?) with the Geologists’ Association
Since 2012, the Geologists’ Association (GA) has put on annual field trips to the Dorset coast led by Prof John CW Cope (of the National Museum Wales), who is author of the definitive Field Guide […]
The Armboth Dyke, Lake District
The Armboth Dyke makes a good half day geology excursion in a scenic but quiet part of the UK Lake District. Parking is on the west shore of Thirlmere, in a pay-and-display car park accessed […]
Seeing into the ‘Stone Age’: the stone tools of early man
In the early part of his evolution, man made great use of rock and stone to assist him in his activities. The term ‘Stone Age’ has been given to the period of time during which […]
Urban geology: a rostroconch in Hoofddorp
Part of my job is to provide service teaching for the University of Leiden. The university lacks a geology department, but my colleagues and I provide tuition in stratigraphy and palaeontology for life science students […]
Carbon Capture and Storage (CCS) – using geology to fight climate change
Practically everyone has an opinion on climate change by now, although for the vast majority of scientists, the weight of evidence is overwhelming – emissions of carbon dioxide and other greenhouse gases are causing climate […]
Australia’s Polar Cretaceous mammals
The Cenozoic Era is commonly referred to as the ‘Age of Mammals’. That is certainly the time in the history of life when their fossils are most abundant and diverse. However, two-thirds of mammalian history […]
All change at Selsey, West Sussex, UK
Issue 26 of Deposits magazine in the Spring of 2011 included my article on fossil collecting at Bracklesham Bay in West Sussex, following in the footsteps of my guide book on Fossil hunting at Bracklesham […]
The Erzberg Mine in Austria – An iron ore reserve with a long tradition
The Erzberg Mine is situated in the Austrian county of Styria. From a geological point of view, it belongs to the so-called greywacke zone, which represents a band of Palaeozoic metamorphosed sedimentary rocks intercalated between […]
Hutton’s unconformity and the birth of ‘Deep Time’
I sometimes ask a question to students in an introductory class about geology: “What is the most famous geological site in the world?” For students from the western hemisphere, the Grand Canyon in the USA […]
The Giant’s Causeway (part 2): other volcanic highlights
This is the second and final part of an article on the volcanic highlights of Northern Ireland’s Giant’s Causeway and surrounds. We were in the area for several days and the weather was fairly mixed, […]
Jamaica’s geodiversity (Part 2): highlights from the Neogene
This is the second and concluding part of our introduction to Jamaica’s geodiversity. Here, we are concerned with more Neogene ‘highlights’ dating from the Middle or Late Miocene, about 10mya, when the island became, once […]