Here we present the dataset collected during a CO2 flow-through test using a synthetic sandstone of high porosity and permeability, originally saturated with high salinity brine, performed under realistic shallow reservoir conditions stress. During the test, we collect geophysical data (elastic and electrical properties) which record petrophysical variations in the rock related to the precipitation of salt, induced by a continuous CO2 flow through the sample.

The dataset contains unconfined compressive strength data of salt samples collected from the Northwich Halite Member at the Winsford Mine in Cheshire, UK. Each sample was unconfined and deformed under standard uniaxial stress conditions, where the primary principal stress corresponds to the axial stress and the intermediate and minimum principal stresses are equal to 0. Each sample was axially compressed using either a constant strain rate of 1e-5 per second or a constant loading rate of 200 N/s. The tests were completed using a servo-controlled stiff load frame in the Rock Mechanics and Physics Laboratory at the British Geological Survey, Keyworth UK. The data are separated into individual Microsoft Excel files, with each file representing a single test. Each file contains time, force, stress, displacement, and strain data.

This dataset provides an assessment of the potential for dissolution within a geological deposit. Ground dissolution occurs when certain types of rock contain layers of material that may dissolve if they get wet. This can cause underground cavities to develop. These cavities reduce support to the ground above and can lead to a collapse of overlying rocks. Dissolution of soluble rocks produces landforms and features collectively known as 'karst'. Britain has four main types of soluble or 'karstic' rocks; limestone, chalk, gypsum and salt, each with a different character and associated potential hazards. Engineering problems associated with these karstic rocks include subsidence, sinkhole formation, uneven rock-head and reduced rock-mass strength. Sinkhole formation and subsidence has the potential to cause damage to buildings and infrastructure. Complete Great Britain national coverage is available. The storage formats of the data are ESRI Shapefiles and MapInfo but other formats can be supplied. The GeoSure data sets and reports from the British Geological Survey provide information about potential ground movement or subsidence in a helpful and user-friendly format. The reports can help inform planning decisions and indicate causes of subsidence. The methodology is based on 'BGS Geology' (Digital Map) and expert knowledge of the behaviour of the formations so defined.

The dataset contains indirect tensile strength data of salt samples collected from the Northwich Halite Member at the Winsford Mine in Cheshire, UK. Each sample was unconfined and deformed under uniaxial compression, where the primary principal stress corresponds to the axial stress and the intermediate and minimum principal stresses are equal to 0. Each sample was deformed using a constant loading rate of 200 N/s. The tests were completed using a servo-controlled stiff load frame equipped with an indirect tension fixture in the Rock Mechanics and Physics Laboratory at the British Geological Survey, Keyworth UK. The data are separated into individual Microsoft Excel files, with each file representing a single test. Each file contains time, axial force, axial displacement, and tensile stress data.

The dataset contains triaxial compressive strength data of salt samples collected from the Northwich Halite Member at the Winsford Mine in Cheshire, UK. Each sample was subjected to varying strain or displacement-equivalent rates under conventional triaxial stress conditions to evaluate its mechanical response to different loading conditions. The experiments were conducted over two testing campaigns between July 2022 and August 2023, using a servo-controlled stiff load frame in the Rock Mechanics and Physics Laboratory at the British Geological Survey, Keyworth, UK. The dataset is organized into individual Microsoft Excel files, each corresponding to a single test and containing parameters such as time, force, stress, displacement, and strain. A summary file detailing sample characteristics and test conditions is also included.

Data detailing the distribution and nature of springs in the UK. Originally constructed to hold data relating to karst geohazards, the database has been extended from the Limestone, Chalk, Gypsum and Salt areas to include all springs. The data is stored locally as ArcView shape and .dbf files (for information gathered through the karst geohazards - ground movements: dissolution project) with the data copied to ORACLE. Data can also be input directly into ORACLE. The database is an important component part of the karst geohazards database.

**NO LONGER EXISTS**Data detailing the distribution and severity of dissolution (karst) features throughout the UK. The data is stored locally as ArcView shape files with associated database information detailing the severity of the karst geohazards ranked from 1-5. The dataset is under construction, but will eventually cover the karst geohazards related to Limestone, Chalk, Gypsum and Salt. Consistent data, but some variability depening on the age of the source digital maps.

The current database was developed to record Karst Geohazard information acquired as part of its onshore core and commissioned mapping programmes. Information held on the database includes details on stream sinks, sinkholes, natural cavities and associated building damage. The database is being compiled when staff and project funds are available to do the work. The dataset is currently updated on an irregular basis as new karst geohazard information is received from field surveys. Karst geohazard details observed and measured in the field are recorded on a standard proforma or digitally using the BGS•SIGMAmobile tablet computers or in the office via a GSD (Geological Spatial Database) to ensure consistency of information and to allow easy entry into the database. The database currently holds details of karst geohazards in: The limestone areas of the Mendip Hills, Bath, Bristol, Monmouth, Plymouth, Derbyshire Dome,and South Wales (North Crop), North Pennines (Malham to Hawes and Weardale: Rookhope to Cornriggs). The chalk of Southern England (especially in Dorset, and the Salisbury, Winchester, Andover, Basingstoke, Dorchester, Hungerford and Alresford, Worthing, South London (Leatherhead-Croydon-Bromley), Newbury, Maidenhead, Hemel Hempstead, St Albans, Hatfield. Jurassic limestone areas from Grantham to Stamford. Gypsum areas in Yorkshire, Cumbria and Darlington. Salt areas in Cheshire and Stafford (natural and brine extraction-induced sinkholes). The database is eventually intended to hold information on karst geohazards throughout Great Britain and about half of the country is now included.