19 research outputs found
Preliminary results from a bottom trawl survey of Lake Rudolf with additional notes on trials with a midwater frame trawl
This paper includes a short report on preliminary midwater hauls with a frame trawl. The object is (a) to study the relationship between the vertical distribution of
pelagic fish and the scattering layer, and (b) to find out if certain species, which at times occur abundantly in the bottom-trawl on the shallow-water frontiers of the scattering
layer, might extend into offshore waters to constitute an important pelagic resource
Mineral resource information for development plans : phase one West Sussex : resources and constraints
This report is one of a series prepared by the British Geological
Survey for various administrative areas in England and Wales for
Phase One of the Department of the Environment, Transport and the
Regions Research Project Mineral Resource Information for
Development Plans.
The report and accompanying map relate to the area of the West
Sussex Mineral Planning Authority. The report and map delineate
and describe the mineral resources of current, or potential, economic
interest in the area and relate these to national planning designations
which may represent constraints on the extraction of minerals. Three
major elements of information are presented and described:
• the geological distribution and importance of mineral resources
• the extent of mineral planning permissions and the location of
current mineral workings
• the extent of selected planning constraints (national statutory
designations)
This wide range of information, much of which is scattered and not
always available in a consistent and convenient form, is presented
on a digitally-generated summary map. The map is produced at
1:100 000 scale, which is convenient for overall display and allows
for a legible topographic base on which to depict the information. In
addition, as the data are held digitally using a Geographical
Information System (GIS), easy revision, updating and
customisation are possible, including presentation of subsets of the
data at larger scales.
Basic mineral resource information is essential to support mineral
exploration and development activities, for resource management
and land-use planning, and to establish baseline data for
environmental impact studies and environmental guidelines. It also
enables a more sustainable pattern and standard of development to
be achieved by valuing mineral resources as national assets. The purpose of the work is to assist all interested parties involved in
the preparation and review of development plans, both in relation to
the extraction of minerals and the protection of mineral resources
from sterilisation, by providing a knowledge base on the nature and
extent of mineral resources and the environmental constraints which
may affect their extraction. However, it is anticipated that the maps
and report will also provide valuable data for a much wider
audience, including the minerals industry, the Planning Inspectorate,
the Environment Agency, the Countryside Commission, other
agencies and government bodies, environmental interests and the
general public. The mineral resource information has been produced by the
collation and interpretation of data principally held by the British
Geological Survey. The methodology for the collection and display
of the data is described and a range of sources of information and
further contacts is presented. The mineral resources covered are
sand and gravel, crushed-rock aggregate, brick clay, chalk, oil and
gas, building stone, fuller’s earth and secondary aggregates
Geology of the Devizes district : sheet description for the British Geological Survey 1:50 000 Series Sheet 282 (England and Wales)
This Sheet Description provides a summary of the geology
for the area of 1:50 000 Sheet 282 Devizes. The Devizes
district extends over approximately 600 km2 of north-east
Wiltshire, covering much of Salisbury Plain in the south
and most of the Vale of Pewsey in the north.
Jurassic, Cretaceous and Palaeogene strata crop out at
surface and Quaternary deposits include alluvium, peat, river
terraces and head. A full account of the stratigraphy is given
in this report, based on recent mapping and also drawing
from an extensive archive and previous publications.
Concealed strata that have been proved in deep boreholes
are also included in the description. The Oxford Clay
Formation and the Corallian Group, of Jurassic age, crop
out in the extreme north-west of the district, beyond a major
fault. The uppermost part of the Jurassic; the Kimmeridge
Clay formation, Portland and Purbeck groups, crop out
in the north-west near Devizes. However, Cretaceous
rocks underlie most of the district: the Weald Clay, Lower
Greensand, Gault and Upper Greensand formations of the
Lower Cretaceous and the Grey Chalk and White Chalk
subgroups of the Upper Cretaceous. Palaeogene strata are
rare, preserved only as a single isolated outlier capping
Sidbury Hill, near Tidworth.
T he Quaternary deposits are described in relation to
their mode of origin and they include the residual deposits,
fluvial and organic deposits, and artificial ground. A section
is devoted to applied geological issues such as geotechnical
factors that should be taken into consideration in any
land development, for example, landsliding has affected
the Upper Greensand escarpment in the north-west of the
district. The chalk is a major aquifer in the district and
an account of its hydrogeology is given. Other resources
described include sand and gravel, building stones and brick
clays. The Information Sources lists all the BGS publications
relevant to the district and gives information on how
to gain access to BGS collections and databases, including
borehole records, geophysical, geochemical and geotechnical
data
Geology of the Devizes district : a brief explanation of the geological map Sheet 282 Devizes
Recent progress in strawberry breeding and genetics at NIAB EMR, East Malling, UK
The strawberry breeding programme at East Malling (NIAB EMR), Kent, UK (UK) has successfully released 45 cultivars, primarily to the northern European market, since its inception in 1983. Since 2008 funding for the commercial programme has been met via the East Malling Strawberry Breeding Club (EMSBC), a public-private partnership. The EMSBC objectives are to develop a range of high-quality cultivars with overlapping seasons which crop in succession and combine excellent fruit quality with high yield, low percentage waste and resistance to fungal and oomycete diseases. Since 2008 the programme has released seven new cultivars including 'Malling™ Centenary' which has become the UK standard short-day cultivar and more recently 'Malling™ Allure' and 'Malling™ Champion', late short-day and everbearer cultivars respectively. A number of promising advanced selections, particularly everbearers, are in the final large-scale trials, and show commercial potential. The EMSBC programme is seeking to incorporate the outputs from allied, molecular genetic based research at NIAB EMR, particularly in relation to disease resistance. Recent developments have included the identification of QTL associated with resistance to powdery mildew (Podosphaera aphanis) and strawberry crown rot (Phytophthora cactorum) and successful use of CRISPR/Cas9-mediated mutagenesis in both the diploid and octoploid strawberry. In addition, the development of breeding tools has included a 3D imaging system for strawberry fruit quality and drone-based phenotyping platform for field disease screening