Metadata catalogue
hydrosphere, lithosphere
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Tectonic elements in the Bay of Biscay.
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Offshore volcanic geologic faults in the North Atlantic Ocean.
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Location of marine basin divisions in the North Atlantic around Ireland. A geological basin is a large low-lying area. It is often below sea level. There are five designated basins and each basin represents a large submarine depression of a generally circular, elliptical or oval shape and by depression we mean any depressed or lower area in the ocean floor.
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Data on the offshore volcanic geologic ridges near Ireland in the West European Basin. A ridge is a geological feature consisting of a chain of mountains or hills that form a continuous elevated crest for some distance. Ridges are usually termed hills or mountains as well, depending on size.
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Data on the offshore geologic igneous features in the North Atlantic Ocean near Ireland. Igneous rock (derived from the Latin word ignis meaning fire) is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. Igneous rock may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. This magma can be derived from partial melts of pre-existing rocks in either a planet's mantle or crust. Typically, the melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Over 700 types of igneous rocks have been described, most of them having formed beneath the surface of Earths crust.
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The location of 170 offshore wells drilled in the Irish offshore area. Offshore wells cover the Irish Exclusive Economic Zone including the Irish Sea, Saint George's Channel, Celtic Sea and the North Atlantic Ocean. Offshore wells recorded between 1970 and 2013 available with this dataset. Offshore wells licensed and drilled by commercial oil and gas exploration companies. Offshore wells provide reporting information on the oil and gas exploration potential and experience around Ireland. Data available and provided by the Petroleum Affairs Division (PAD) of the Department of Communications, Climate Action and Environment (DCCAE). Data completed for the period 1970-2013.
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The INtegrated Mapping FOr the Sustainable Development of Ireland's MArine Resource (INFOMAR) programme is a joint venture between the Geological Survey of Ireland (GSI) and the Marine Institute (MI). The programme is the successor to the Irish National Seabed Survey (INSS) and concentrates on creating integrated mapping products related to the seabed. A sound velocity profile shows the speed of sound in water at different vertical levels. It has two general representations: 1. tabular form, with pairs of columns corresponding to ocean depth and the speed of sound at that depth, respectively. 2. a plot of the speed of sound in the ocean as a function of depth, where the vertical axis corresponds to the depth and the horizontal axis corresponds to the sound speed. By convention, the horizontal axis is placed at the top of the plot, and the vertical axis is labeled with values which increase from top to bottom, thus reproducing visually the ocean from its surface downward. A Sound Velocity Profile (SVP) is a measurement of the speed of sound in water. SVP data is collected during multi-beam surveying for calibration purposes to ground-truth the bathymetric and backscatter data collection. Data for SVP point locations and associated attribute values is generated from SVP profiler during survey. Data includes XY Longitude Latitude, Start SVP, End SVP, Maximum Depth, Data Quality and Comments, SVP Instrument Name and Survey Leg name.
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The INtegrated Mapping FOr the Sustainable Development of Ireland's MArine Resource (INFOMAR) programme is a joint venture between the Geological Survey of Ireland (GSI) and the Marine Institute (MI). The programme is the successor to the Irish National Seabed Survey (INSS) and concentrates on creating integrated mapping products related to the seabed. INFOMAR Seabed Samples Particle Size Analysis represent locations where samples have been taken and particle size analysis (PSA) carried out on samples. Sediment type classification based on percentage sand, mud and gravel (after Folk 1954). Every sediment is a mixture of grains of varying sizes. It groups grains into mud, sand and gravel on the basis of their diameter. The relative proportion of the grains in the three categories is then used to describe the sediment and is displayed in a diagram commonly called a “Folk triangle”. This classification has 15 terms to describe the seabed sediments. Samples from the seabed are taken by grab and box core sampling instruments. PSA is applied to determine the range of sediment sizes contained in the sample which can often reveal an insight about the processes operating in the depositional environment. The results show percentage gravels, sands, silt and mud present in the sample. This analysis is also used to determine if the sample is well or poorly sorted.