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Minoan chronology workshop, Sonderborg 10 11 2007

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Information about Minoan chronology workshop, Sonderborg 10 11 2007

Published on November 19, 2007

Author: stuartdunn

Source: slideshare.net

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Slides I gave at the workshop on Minoan chronology, organizer by Aarhus University at Sonderborg, Denmark, in November 2007
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A point in space, a moment in time: towards an integrated view of the Santorini eruption Stuart Dunn Centre for e-Research, King’s College London Santorini Chronology Workshop, Aarhus, 10th November 2007

Objectives: Overview of tephra fallout Consistent representation of data Estimation of bulk volume of ejecta Towards ‘encoding archaeology’ - associating archaeological and natural sciences data spatially and temporally

Overview of tephra fallout

Consistent representation of data

Estimation of bulk volume of ejecta

Towards ‘encoding archaeology’ - associating archaeological and natural sciences data spatially and temporally

Constructing a geodatabase of Theran tephra

Constructing a geodatabase of Theran tephra

Constructing a geodatabase of Theran tephra

Constructing a geodatabase of Theran tephra: problems Accuracy and (versus) precision Georeferencing from heterogeneous formats

Accuracy and (versus) precision

Georeferencing from heterogeneous formats

Constructing a geodatabase of Theran tephra: problems Accuracy and (versus) precision Georeferencing from heterogeneous formats and sources Assessing deposition process Harmonizing points, sections and stratigraphies Georeferencing places formal, based on lat/long or other mathematical expressions Informal , based on placenames, and/or where no formal mathematical identifier is present 24.87 34.87

Accuracy and (versus) precision

Georeferencing from heterogeneous formats and sources

Assessing deposition process

Harmonizing points, sections and stratigraphies

Georeferencing places

formal, based on lat/long or other mathematical expressions

Informal , based on placenames, and/or where no formal mathematical identifier is present

Estimation of bulk volume of ejecta Geographical Information Systems (GIS) Triangulated Irregular Network (TIN) ‘ Conceptually like bending a sheet of rubber to pass through the point, while minimizing the curvature of the surface’ - total raster cell value of 132,508,783.441, or… This is a maximum estimate - c. 90-100 km 3 is nearer the mark - 134.343 +/- 4 km 3

Geographical Information Systems (GIS)

Triangulated Irregular Network (TIN)

This is a maximum estimate - c. 90-100 km 3 is nearer the mark

Towards ‘encoding archaeology’ Parallel between referencing points on the earth’s surface and referencing points in time Relative and absolute Development of reasoning models to manage space and time M. Doerr et al 2004, fig 1. The CIDOC-CRM www.ahessc.ac.uk/briefing_paper

Parallel between referencing points on the earth’s surface and referencing points in time

Relative and absolute

Development of reasoning models to manage space and time

Towards ‘encoding archaeology: ‘meetings’ “ The concept of “meetings is extraordinarily powerful: Chronology concerns and involves events … “Dating” an object actually means approximating the coherence volume of some event(s) in which the object was present. ” Supporting Chronological Reasoning in Archaeology, Doerr et al 2004 M. Doerr et al 2004, fig 2.

“ The concept of “meetings is extraordinarily powerful: Chronology concerns and involves events … “Dating” an object actually means approximating the coherence volume of some event(s) in which the object was present. ”

Supporting Chronological Reasoning in Archaeology, Doerr et al 2004

Towards ‘encoding archaeology: ‘meetings’ A. Deposition of a tephra deposit B. Production of a LMIA cup in Crete - predates A, but with smaller ‘coherence volume’. D. C14-datable fire destruction “ The concept of “meetings is extraordinarily powerful: Chronology concerns and involves events … “Dating” an object actually means approximating the coherence volume of some event(s) in which the object was present. ” - Doerr et al 2004 C. Deposition of cup M. Doerr et al 2004, fig 2.

A. Deposition of a tephra deposit

B. Production of a LMIA cup in Crete - predates A, but with smaller ‘coherence volume’.

D. C14-datable fire destruction

“ The concept of “meetings is extraordinarily powerful: Chronology concerns and involves events … “Dating” an object actually means approximating the coherence volume of some event(s) in which the object was present. ”

- Doerr et al 2004

C. Deposition of cup

A future project: Agent-based modelling

A future project: Agent-based modelling After Giuseppe Trautteur and Raniero Virgilio

To Conclude… [email_address]

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