Date (Publication)

1993-08-14

Identifier

British Geological Survey / BGS_CMD_REF262

Maintenance and update frequency

notPlanned Not planned

Keywords

• NDGO0001

GEMET - INSPIRE themes

• Geology

SeaVoX Vertical Co-ordinate Coverages (L131)

• soil and sediment
• crust

SeaDataNet Parameter Discovery Vocabulary (P021)

• Gravity
• Bathymetry and Elevation
• Two-dimensional seismic reflection

Access constraints

otherRestrictions Other restrictions

Access constraints

otherRestrictions No restrictions, a copyright acknowledgement is required and permission from any third party for the release of the data has been obtained. Inclusion of any third party data will determine the copyright acknowledgement that needs to be made.

Use constraints

otherRestrictions Other restrictions

Other constraints

The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.

Use limitation

unrestricted use, copyright acknowledgement - Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced British Geological Survey materials "Contains British Geological Survey materials ©UKRI [year]"

Spatial representation type

grid Grid

Distance

5  urn:ogc:def:uom:EPSG::9001

Metadata language

EnglishEnglish

Topic category

• Geoscientific information

Geographic identifier

McCallien

Date (Revision)

2023-11-27

Geographic identifier

Rockall Island

Date (Revision)

2023-11-27

Geographic identifier

Anton Dohrn

Date (Revision)

2023-11-27

Geographic identifier

George Bligh Bank

Date (Revision)

2023-11-27

Geographic identifier

Harker

Date (Revision)

2023-11-27

Geographic identifier

Kennedy

Date (Revision)

2023-11-27

Geographic identifier

North Rockall Basin

Date (Revision)

2023-11-27

Geographic identifier

North Hatton

Date (Revision)

2023-11-27

Geographic identifier

Central Rockall Basin

Date (Revision)

2023-11-27

Geographic identifier

Central Hatton

Date (Revision)

2023-11-27

Geographic identifier

Atlantic North-West Approaches, Rockall Trough and Faeroe/Shetland Channel

Date (Creation)

2009-06-18

Geographic identifier

NORTHEAST ATLANTIC OCEAN (40W)

Date (Creation)

1954-01-01

Begin date

1993-07-04

End date

1993-08-14

Reference system identifier

OGP / urn:ogc:def:crs:EPSG::4326

Date (Revision)

2005

Distribution format

OnLine resource

BGS Offshore Geoindex ( HTTP )

GeoIndex allows users to search for information about BGS data collections covering the UK and other areas world wide. Access is free, the interface is easy to use, and it has been developed to enable users to check coverage of different types of data and find out some background information about the data. More detailed information can be obtained by further enquiry through the website.

Hierarchy level

dataset Dataset

Statement

Geophysical equipment types used included: Airgun/Sleeve Gun, CHIRP Sub-bottom Profiler, Echo Sounder and Gravimeter. Digicon Geophysical was contracted to undertake the survey on behalf of Rockall Consortium. NAVIGATION: Skyfix, Differential GPS, WGS-84, Universal Transverse Mercator Zone 28N CM 15W. SEISMIC AIRGUN: 1726.825km (Grid:1065.67km, Transect: 661.15km): Single Tuned Point Source Array, Bolt 1500LL and 1900C airguns, 4 strings of 10,50m wide array. Operating Pressure 1900 psi (min1800psi). Grid: 24 Active guns, 16 spare, array volume 6360 cu in., (min 5410 cu in). Transect: 40 active guns, array volume 9300 cu in., (min 7900 cu in). Array depth: 10+1m. Gun timing system: Digitcon CLASSII. Multi-channel Streamer: 240 groups, 25m group length and interval, total length 6000m, depth 15m +2m, Hydrophone: DG-018 acceleration-cancelling (14 per group), Sample rate: 2 milliseconds and 4 milliseconds, 8 compasses, Digicourse 318 or 321 in-line compass sections. Digicon DSS-240 seismic data acquisition system. Record format: Demultiplexed SEG-Y @ 6250 bpi IBM floating point, tape drives: Telex tri-density(125ips @6250 bpi), Recording parameters: Grid: Record length 10 sec, Sample rate 2ms, Low cut filter 3Hz, High cut filter 160 Hz,Fold coverage 60, Number of Runoff shots 63, Shotpoint intervals 50m, Single Trace Plotter. Trace near 4. Plots every 41 shots, Nav log tape, Single data trace – Quietest of near 4. Transect: Record length 18 sec, Sample rate 4ms, Low cut filter 3Hz, High cut filter 80 Hz,Fold coverage 120, Number of Runoff shots 125, Shotpoint intervals 25m, Single Trace Plotter. Trace near 4. Plots every 41 shots, Nav log tape, Single data trace – Quietest of near 4. On board seismic data processing: Advance Geophysical PROMAX on an IBM340. Brute stacks produced for Grid survey and Transect lines. GRAVITY: Lacoste and Romberg S-75 fitted with a J & K interface box and using Co-operator v3.62 software, all lines except the latter half of D13 and first half of D15. Grid: recorded at 10 second interval. Transect: recorded at 5 second interval. Base ties, field cross-tie calculations. For more detailed information on the acquisition equipment and data collection techniques, operational standards, data processing methods and quality control procedures used on this survey see the Report of Survey/Cruise Report and associated documentation where available. The information available may vary depending on the age of the survey. Data are checked and loaded to the BGS Coastal and Marine data management system following BGS marine data management procedures.

File identifier

abc9f747-5372-0f38-e044-0003ba9b0d98 XML

Metadata language

EnglishEnglish

Hierarchy level

dataset Dataset

Date stamp

2023-11-27

Metadata standard name

MEDIN Discovery Metadata Standard

Metadata standard version

Version 2.3.5