|ID||Michel: 1552-1553 Scott: 1448-1449 Stanley Gibbons: Yvert: UPU: N/A Category: pF|
|Stamps in set||2|
|Value||NOK 5.50 - Thortveitite
NOK 6.00 - Fossil radiolaria (Lamprocyclas maritalis), map of Norway and continental shelf, oil rig and ship, pipeline, and geological cross section.
|Size (width x height)|
|Layout||50 stamps per sheet|
|Products||FDC x 1|
|Printed by||Joh. Ensched, Netherlands|
One of the stamp subjects, taken from the Continental Shelf, shows the connection between geology and oil and gas recovery. The other shows the world's first scandium mineral, Thortveitite. It was discovered in Setesdal in 1903 and called after Norwegian mineral exporter Olaus Thortveit (1872-1917).
Radiolarians (also radiolaria) are amoeboid protozoa (diameter 0.1-0.2 mm) that produce intricate mineral skeletons, typically with a central capsule dividing the cell into inner and outer portions, called endoplasm and ectoplasm. They are found as zooplankton throughout the ocean, and their skeletal remains cover large portions of the ocean bottom as radiolarian ooze. Due to their rapid turn-over of species, they represent an important diagnostic fossil-found from the Cambrian onwards
Shell campanulate, very similar to the preceding species (Lamprocyclas nuptialis) in form and fenestration, but not so slender and with different peristome. Length of the three joints = 4:5:6; breadth = 4:10:13. Cephalis subspherical, with a very stout, pyramidal horn of twice the length, the edges of which are spirally convoluted. Outer coronal of the peristome with twelve to fifteen short, divergent feet, inner with as many convergent, longer feet. Dimensions Length of the three joints, a 0.04, b 0.05, c 0.06; breadth a 0.04, b 0.1, c 0.12
Latest update 21.11.2017
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