Geological Survey of Finland - Rock Formation Age Determinations History
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This table contains the version history for the rows of the base table 'rajapinnat_gtk_kalliopera_wfsikamaaritykset__ikamaaritykset'. Each row in this table represents a specific version of a row in the base table, and includes the start and end dates of the version. The data in this table is sourced from 'Geological Survey of Finland' which originates from the country 'Finland' (ISO country code 'fi'). The table includes various columns which provide information about age determinations, sample field codes, map sheets, geographical coordinates, rock types, minerals, analytical method details, age reliability, publication status, references, comments, age legends, error estimates, and geometric properties. By analyzing the data in this table, one can gain insights into the temporal variation of geological parameters, examine the reliability and accuracy of age determinations, study the distribution and characteristics of rocks and minerals, and perform spatial analysis based on geographical coordinates and geometric properties.
Field Descriptions
| Name |
Data type |
Description |
| _start_date | date | The start date indicating the validity period of the row version. |
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| _end_date | date | The end date indicating the validity period of the row version. |
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| _row_number | long | The row number of the version history. |
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| gml_id | string | The ID of the GML object. |
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| objectid | int | The object ID. |
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| age_determination_id | string | The ID of the age determination. |
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| sample_field_code | string | The code of the sample field. |
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| map_sheet | int | The map sheet. |
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| northing | int | The northing coordinate. |
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| easting | int | The easting coordinate. |
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| ykj_north_original | int | The original YKJ north coordinate. |
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| ykj_east_original | int | The original YKJ east coordinate. |
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| location | string | The location. |
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| rock_type | string | The type of rock. |
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| mineral | string | The mineral. |
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| mineral_c12 | string | The C12 isotope of the mineral. |
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| system | string | The system. |
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| method | string | The method. |
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| number_of_analyses | int | The number of analyses. |
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| reliability_of_age | string | The reliability of age determination. |
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| epsilon_nd_age | float | The Epsilon ND age. |
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| published | string | The publication status. |
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| reference | string | The reference. |
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| comments | string | Comments. |
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| age_legend | int | The legend for age determination. |
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| error_two_sigma_legend | int | The legend for error estimation with two sigma. |
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| age2_legend | int | The legend for the second age determination. |
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| error_two_sigma_legend2 | int | The legend for error estimation with two sigma for the second age determination. |
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| age_determined | int | The determined age. |
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| error_estimate_two_sigma | int | The error estimate with two sigma. |
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| lower_intercept_age_u_pb | int | The lower intercept age in U-Pb. |
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| error_lower_intercept_age | int | The error estimate for the lower intercept age. |
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| mineral2 | string | The second mineral. |
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| mineral2_c30 | string | The C30 isotope of the second mineral. |
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| age_determined2 | int | The determined age for the second mineral. |
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| error_estimate_two_sigma2 | int | The error estimate with two sigma for the second mineral. |
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| geom_geojson | string | The geometry in GeoJSON format. |
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| geom_geotext | string | The geometry in geotext format. |
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| geom_type | string | The geometry type. |
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| geom_centroid | string | The centroid of the geometry. |
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| geom_center_x | double | The x-coordinate of the center of the geometry. |
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| geom_center_y | double | The y-coordinate of the center of the geometry. |
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| geom | binary | The geometry. |
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