Ruth Siddall

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Papers by Ruth Siddall

The Gurob Ship-Cart Model and Its Mediterranean Context: An Archaeological Find and Its Mediterranean Context

Texas A&M University Press, 2013

The Characterisation of Lime Plasters from Lamanai, Belize: A Diachronic Approach to the Study of Architectural Practices

This paper presents the micromorphological and compositional characteristics of architectural pla... more This paper presents the micromorphological and compositional characteristics of architectural plasters from Lamanai dating from ca. 100 BC to the sixteenth century AD, as well as non-archaeological local raw materials. The study made use of petrography and X-ray fluorescence (XRF) for the analyses of 45 samples.

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Anton Dohm Seamount and the evolution Atlantic Basalts Guyot Rifting Roc kali of the Rockall Trough

RÉSUMÉ Atlantique Basaltes Guyot Rifting Rockall E. John W. JONES a, Ruth SIDDALL a, Matthew F. T... more RÉSUMÉ Atlantique Basaltes Guyot Rifting Rockall E. John W. JONES a, Ruth SIDDALL a, Matthew F. THIRLWALL b, P. Neil CHROSTON c and Adrian J. LLOYD a a Department of Geological Sciences, University College London, Gower Street, London WCIE 6BT, UK. b Department of Geology, Royal Holloway, University of London, Egham Hill, Egham, Surrey TW20 OEX, UK. c School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK. Received 18/05/93, in revised form 6/12/93, accepted 13/12/93. Seismic data from the flat-topped Anton Dohrn Seamount in the central Rockall Trough reveal that the feature is capped by a thin (100 rn) sedimentary layer which covers an extensive erosion surface lying approximately 800 rn below sea leve!. The surface of erosion truncates a volcanic sequence that outcrops on the eastern side of the seamount to form a well-defined terrace from which alkali basalts and chalks of late Cretaceous age have been recovered. A refraction profile shot over the summit...

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Pompeii Purpurissum Pigment Problems, Art '05

Towards a long-term denudation chronology of NW Europe

Terra Nova, 1997

Thermotectonic evolution of the Bay of Biscay

Nuclear Tracks and Radiation Measurements, 1993

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The composition of the Earth: Rocks and Minerals

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Natural Stone and World Heritage: The Castles and Town Walls of King Edward in Gwynedd

Preface xi Acknowledgements xv Author xvii List of abbreviations and acronyms used in the text xi... more Preface xi Acknowledgements xv Author xvii List of abbreviations and acronyms used in the text xix 1 Introduction 1 2 Regional geology, building stones and quarries in North West Wales 11 2.1 Introduction 2.2 A history of geological research 2.3 The Precambrian rocks of Anglesey 2.4 The Neoproterozoic to Cambrian rocks of the mainland 2.4.1 Llanberis Slate Formation 2.5 Cambrian and Ordovician rocks in the Harlech Dome 2.6 Ordovician Strata 30 2.6.1 The Mawddach and Nant Ffrancon Groups 30 2.6.2 The slate quarries of Blaenau-Ffestiniog 34 2.6.3 The Middle Ordovician Strata of Anglesey 2.6.4 Caradoc volcanic rocks and slates 2.6.5 Conwy Castle Grits 2.7 Silurian and Devonian 2.8 The Carboniferous rocks of Anglesey and the mainland 41 2.8.1 The Basement Beds Contents viii Contents 2.8.2 Clwyd Limestone Group 2.8.3 Warwickshire Group 2.8.4 Gloddaeth Purple Sandstone 2.9 Intrusive igneous rocks 2.9.1 The Neoproterozoic granites: Twthill and Coedana Granites 2.9.2 Penmaenmawr Granodiorite 2.9.3 The intrusive igneous rocks of Snowdonia 2.9.4 The Nefyn Cluster and Nanhoron Intrusions of the Llyn Peninsula 60 2.10 Pleistocene and Quaternary deposits 2.11 Stone from outside the region 2.11.1 Merionethshire Slate and other Welsh slates 2.11.2 Carboniferous and Permo-Triassic Sandstones 2.11.2.1 Millstone Grit 2.11.2.2 York Stone and other Coal Measures sandstones 2.11.2.3 The Cheshire sandstones 2.11.3 English Jurassic limestones 2.11.4 English Alabaster 2.11.5 Imported igneous and metamorphic rocks 2.12 Ballast 3 North West Wales before Edward I 3.1 Introduction 3.2 Stone building in the Neolithic Period 3.3 Neolithic industry: stone tools 3.4 The Bronze Age 3.5 Bronze Age industry 3.6 The Iron Age 3.7 The Roman occupation 3.7.1 Canovium 3.7.2 Segontium 3.7.3 Tomen-y-Mur 3.7.4 Small Roman forts and Romano-British settlements 3.8 Iron Age and Roman industry 3.9 The early Christian to Norman Periods 3.9.1 Early churches Contents ix 3.9.1.1 Penmon Priory 3.10 The early Medieval castles 3

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Asphaltite Pigments in Ancient Egypt

Plastering the Prehistory: Marl as a unique material to cover, maintain and decorate the Neolithic walls of Catalhöyük

Catalhoyuk (World Heritage site, c.7400 BC) is a renowned Neolithic site in central Anatolia, Tur... more Catalhoyuk (World Heritage site, c.7400 BC) is a renowned Neolithic site in central Anatolia, Turkey on account of its size, well-preserved mudbrick architecture and wall art. The current international project led by Professor Ian Hodder has been continuing since the 1990’s and the studies showed that people of Catalhoyuk were highly aware of their natural environment and knew how to skillfully modify their resources to develop various material technologies according to their needs. One of the most important material technologies evident at Catalhoyuk makes the site unique within the Neolithic Anatolia and the Near East is the use of ‘Marl’ as a plastering material to cover the internal surfaces of the mudbrick walls. This paper is based on the most recent research undertaken on the technology of the Catalhoyuk wall ‘plasters’ and paintings and will aim to look at what it is meant by ‘plaster and plastering’ in the context of Neolithic Catalhoyuk, identify materials and their charac...

Thermotectonic evolution of the continental margins of the Bay of Biscay : application of apatite fission track analysis

The sensitivity of apatite fission tracks to cooling and unroofing episodes in Earth history is p... more The sensitivity of apatite fission tracks to cooling and unroofing episodes in Earth history is particularly suited to the tectonic processes of rifting and the long-term evolution of continental margins. Apatite fission track analyses have been made on ~70 samples of igneous, metamorphic and sedimentary rocks from coastal outcrops of Western France (the Armorican Massif) and north-western Spain (the Hesperian Massif) the aim being to unravel the potential thermal overprint associated with the opening of the North Atlantic Ocean, specifically in the Bay of Biscay. This thesis reviews the geological evolution of the continental margins of the Bay of Biscay region and presents the fission track sampling strategies and analytical results. The fission track ages range from ~70 to 270 Ma, with the youngest ages towards the Atlantic coasts, and become progressively older eastwards. The data are interpreted in terms of the thermal histories resulting from the Mesozoic postbreakup exhumatio...

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Urban Geology in St Pancras Church

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Cementitious materials of the ancient world

Turning Landscape into Colour

Turning Landscape into Colour includes an essay 'The Names of the Earths' by Dr. Spike Ug... more

Pre-Roman waterproofing mortars in Ancient Corinth: materials and technology

Mortiers et hydraulique en Méditerranée antique, 2019

This paper will present both petrographic and preliminary chemical analyses which indicate that w... more This paper will present both petrographic and preliminary chemical analyses which indicate that waterproofing mortars in the Fountains of Peirene and Glauke, at the Asklepieion and its associated springs and at the springhouse of Upper Peirene on the Acrocorinth had hydraulic properties which were previously unrecognised in Pre-Roman cements in this region. The waterproofing mortars of pre-Roman Corinth demonstrate a high degree of technical understanding of the production of lime-silica cements, which has otherwise been previously overlooked.

Anton Dohrn Seamount and the evolution of the Rockall Trough

Oceanologica Acta, 1994

Seismic data from the flat-topped Anton Dohrn Seamount in the central Rockall Trough reveal that ... more Seismic data from the flat-topped Anton Dohrn Seamount in the central Rockall Trough reveal that the feature is capped by a thin (approximately 100 m) sedimentary layer which covers an extensive erosion surface lying approximately 800 m below sea level. The surface of erosion truncates a volcanic sequence that outcrops on the eastern side of the seamount to form a well-defined terrace from which alkali basalts and chalks of late Cretaceous age have been recovered. A refraction profile shot over the summit plateau and ultrasonic measurements on the basalts suggest that sedimentary and volcanoclastic units are abundant constituents of a low-velocity (3.69 km s-1) volcanic core which persists to depths of over 1 500 m. The seamount differs from the shallow Cenozoic volcanic piles in the region where high seismic velocities ( 5 km s-1) occur close to the sea bed. Minor element abundances and REE inversion indicate that the Anton Dohrn basalts have been generated as a result of within-pl...

Pigment Compendium

The castles and town walls of Edward I

Natural Stone and World Heritage

Building the towns of North West Wales

Natural Stone and World Heritage

Gazetteer of sites mentioned in the text

Natural Stone and World Heritage

Ruth Siddall

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