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El. knyga: Gwithian Landscape: Molluscs and Archaeology on Cornish Sand Dunes

(University of Reading), Contributions by , Contributions by
  • Formatas: 210 pages
  • Išleidimo metai: 31-Mar-2018
  • Leidėjas: Archaeopress Archaeology
  • Kalba: eng
  • ISBN-13: 9781784918040
  • Formatas: 210 pages
  • Išleidimo metai: 31-Mar-2018
  • Leidėjas: Archaeopress Archaeology
  • Kalba: eng
  • ISBN-13: 9781784918040

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Gwithian, on the north coast of Cornwall, is a multiperiod archaeological site. Excavations by Charles Thomas in the mid-twentieth century provided evidence of human activity from the Mesolithic to the post-medieval period. The present work explores the palaeoenvironment of the area around the settlement sites, from the Neolithic, when sand dunes initially developed in the Red River valley, to the present post-industrial landscape. Multiproxy analyses on sediments from coring, a test pit and mollusc columns provide a view of the changing landscape and how it may have influenced, or been influenced by, human presence and settlement. Mollusc studies are used as the principal analytical method. Multiple radiocarbon and optically stimulated luminesce dates permit these changes to be studied on a tighter time frame than was previously possible. Mining activity from the Bronze Age to the present is explored using fine-resolution geochemistry. Dating allows the timing of the extinction and introduction of some mollusc species to be refined.
List of figures
iv
List of tables
viii
Preface ix
Foreword x
Acknowledgements xii
Note concerning dates used in this work xii
Photographs xii
Chapter I Introduction
1(6)
Archaeology and coastal dune sites
1(1)
Molluscs and archaeology
2(3)
The present study
5(1)
Extinction and introduction of mollusc species
6(1)
Chapter II Gwithian and its archaeological complex
7(13)
Geology and geography
8(5)
Archaeology
13(7)
Mesolithic
15(1)
Neolithic
15(1)
Bronze Age
15(3)
Iron Age and Roman
18(1)
Post-Roman
18(1)
Early medieval
19(1)
Later medieval
19(1)
Chapter III Previous molluscan studies at Gwithian
20(4)
Lewis
20(1)
Spencer
21(1)
Milles
22(1)
Davies
23(1)
Discussion
23(1)
Chapter IV The current study at Gwithian
24(14)
Introduction
24(1)
Field methods
25(5)
The coring transect line
25(1)
Ground penetrating radar (GPR)
26(1)
Coring
27(2)
Mollusc column samples
29(1)
Trench excavation
29(1)
Modern molluscs
29(1)
Laboratory methods
30(8)
Core samples
30(1)
Mollusc analysis
31(3)
Particle size analysis
34(1)
pH estimation
34(1)
Loss on ignition
34(1)
X-ray fluorescence (XRF) geochemistry
35(1)
Micromorphology
35(1)
Pollen analysis
35(1)
Diatom analysis
36(1)
Optically stimulated luminescence (OSL) dating
36(1)
Radiocarbon dating
36(2)
Chapter V The coring transect
38(7)
Turf blocks
38(3)
Molluscs from the Red River leet
40(1)
Ground penetrating radar
41(4)
South of the Red River
41(1)
Between the Red River and the Towans scarp
42(1)
The Towans
43(1)
The cores
43(2)
Chapter VI Percussion cores
45(38)
South 158m core
45(5)
South 58m core
50(3)
0.5m core
53(5)
15m core
58(6)
30m core
64(5)
51m core
69(4)
76m core
73(3)
The meadow - 100m to 245m
76(1)
100m core
77(2)
125m core
79(2)
150m core
81(2)
Chapter VII Hand auger cores
83(22)
175m core
83(1)
200m core
84(2)
225m core
86(1)
245m core
87(1)
289m core
88(3)
345m core
91(2)
400m core
93(2)
451m core
95(1)
495m core
96(2)
528m core
98(2)
551m core
100(2)
570m core
102(1)
582m core
103(2)
Chapter VIII Pollen analysis at Gwithian - by Dr. C. R. Batchelor
105(6)
Introduction
105(1)
Methods
105(1)
Results, interpretation and discussion
105(6)
Interpretation and discussion of the Gwithian pollen analysis
109(2)
Chapter IX Chronology and discussion of the coring transect
111(7)
Time-depth graphs
112(2)
Mesolithic, Neolithic and early Bronze Age
114(1)
Middle and late Bronze Age
115(1)
Iron Age, Romano-British and medieval
116(1)
Recent
116(1)
Meadow
117(1)
The Towans
117(1)
Chapter X Trench excavation
118(13)
Excavation methods
118(1)
Excavation findings
119(4)
Buried soils
120(3)
Dating of the trench samples
123(2)
Mollusc column
125(3)
The molluscs
125(3)
Discussion
128(3)
Chapter XI Micromorphology analysis of a buried soil - by Dr R. Y. Banerjea
131(10)
Introduction
131(1)
Methods
131(1)
Sample preparation
131(1)
Sample Description
131(1)
Results and interpretation
132(7)
Characterisation and formation processes
135(1)
Windblown sands (Units 1, 3 and 5)
136(1)
Buried Soil (Unit 2)
137(1)
Calcrete Crust Formation (Unit 4)
138(1)
Post-depositional alterations
138(1)
Weathering and decay processes
138(1)
Bioturbation
139(1)
Discussion and conclusions
139(2)
Evidence for cultivation
139(2)
Chapter XII Mollusc studies in the wider Gwithian landscape
141(15)
West Godrevy Towans - Walker
141(3)
Strap Rocks (A) - Walker
144(8)
Strap Rocks (B) - Musset
152(1)
Sandcot - Kevill
153(1)
Valley Floor - Bull
154(2)
Chapter XIII Mining for tin and other metals
156(8)
The mining process
158(1)
The Red River and its catchment area
159(2)
Geochemistry of the Red River valley core
161(3)
Chapter XIV Discussion and conclusions
164(14)
The Gwithian environment
164(8)
Mesolithic and Neolithic
167(1)
Early Bronze Age
168(1)
Middle/late Bronze Age
169(1)
Late Bronze Age/early Iron Age
169(1)
Iron Age to post-Roman/early medieval
170(1)
Medieval and recent
171(1)
Tidal estuary and sea level
172(1)
Mining in the Red River catchment
173(1)
Mollusc extinctions and introductions
174(2)
Conclusions
176(2)
Bibliography 178(12)
Index 190
THOMAS WALKER is Visiting Research Fellow in the Department of Archaeology, University of Reading. After a career in medicine he entered the world of archaeology in retirement, initially studying for a BSc at Reading and then progressing to a PhD. This monograph is based on his PhD thesis, which explored the palaeoenvironment of blown sands in Cornwall, principally at Gwithian.