Version History of Geological Survey of Finland - Isotopic Analysis of Sm-Nd for KallioPerä Well Data
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This table contains the version history of the data extracted from the web site of the Geological Survey of Finland (GTK) for the 'Kalliopera_WFSSM_ND_Isotooppianalyysi_SM_ND_Isotooppianalyysi' dataset. It tracks changes in the data over time by storing the start and end dates of each row's version. The data in this table is sourced from the country with the ISO country code 'FI', which corresponds to Finland. The table consists of various columns including '_start_date' and '_end_date', which represent the extraction dates of the row versions. While the individual column descriptions are not provided, this table's data can be used for various data analytics purposes. For example, it can be analyzed to understand the distribution and variation of minerals and rock types, explore the relationship between isotopic compositions and ages, evaluate the accuracy of age estimates, or identify geological formations based on the available information. The 'gml_id' column can be used to uniquely identify each row, and spatial analysis can be performed using the geometry-related columns such as 'geom_geojson', 'geom_geotext', 'geom_type', 'geom_centroid', 'geom_center_x', 'geom_center_y', and 'geom'.
Field Descriptions
| Name |
Data type |
Description |
| _start_date | date | Start date indicating the validity period of the row version |
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| _end_date | date | End date indicating the validity period of the row version |
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| _row_number | long | Numerical identifier for the row |
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| gml_id | string | Unique identifier in GML format |
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| objectid | int | Unique identifier for the object |
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| sample_anal | string | Details related to sample analysis |
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| map_sheet | int | Map sheet reference |
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| northing | int | Northing coordinate value |
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| easting | int | Easting coordinate value |
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| ykj_north_original | int | Original Ykj North coordinate value |
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| ykj_east_original | int | Original Ykj East coordinate value |
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| location_mineral | string | Mineral location details |
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| rock_type | string | Type of rock |
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| sm_ppm | float | Parts per million value for samarium |
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| nd_ppm | float | Parts per million value for neodymium |
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| sm147_nd144 | int | Ratio of Samarium 147 to Neodymium 144 isotopes |
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| error_estimate_two_sigma | int | Error estimated with a two sigma value |
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| nd143_nd144 | int | Ratio of Neodymium 143 to Neodymium 144 isotopes |
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| error_estimate_two_sigma2 | int | Another error estimate with a two sigma value |
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| age_ma | int | Age in millions of years |
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| epsilon_nd_age | int | Epsilon value for neodymium age |
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| model_age_ma | int | Model age in millions of years |
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| domain | string | Domain information |
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| reference | string | Reference information |
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| sort | string | Sorting information |
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| model_age_ma_legend | int | Legend information for model age in millions of years |
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| age_u_pb_ma | int | Uranium-lead age in millions of years |
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| age_error | int | Error in age estimation |
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| comments | string | Additional comments or remarks |
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| group_col | string | Grouping column |
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| formation | string | Formation information |
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| geom_geojson | string | Geometry data in GeoJSON format |
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| geom_geotext | string | Geometry data in Geotext format |
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| geom_type | string | Type of geometry |
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| geom_centroid | string | Centroid of the geometry |
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| geom_center_x | double | X-coordinate of the geometry center |
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| geom_center_y | double | Y-coordinate of the geometry center |
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| geom | binary | Geometry data |
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