overprint

plural overprints

1. hobbiesAn addition of new text on a previously printed stamp, usually to add a surcharge or change the face value.
2. by analogygeographyThe set of petrological, structural, and/or mineralogical characteristics superimposed onto rock by the action of geological processes over deep time.

   The metasomatic overprint is represented mainly by enrichments in Na, K, Ba, Ti and LREE and the original source of this fluid remains unknown.

   2017 April, Ekaterina S. Kiseeva, Vadim S. Kamenetsky, Gregory M. Yaxley, Simon R. Shee, “Mantle melting versus mantle metasomatism – "The chicken or the egg" dilemma”, in Chemical Geology, volume 455, Elsevier BV, →DOI, archived from the original on 12 Jul 2024, pages 120–130

   2 more examples

   Although we do not exclude that some of the observed Moodies laminae were originally microbial mats, the mineral assemblage of the studied anastomosing and wavy laminae (i.e., mainly sericite associated with Ti oxide and rare carbonaceous material) shows a substantial metamorphic overprint, implying that similar laminae cannot be unambiguously associated with the concept of a flourishing Paleoarchean microbial life at 3.22 Ga.

   2021 August, Masafumi Saitoh, Nicolas Olivier, Marion Gar on, Maud Boyet, Christophe Thomazo, Julien Alleon, Jean-François Moyen, Vincent Motto-Ros, Johanna Marin-Carbonne, “Metamorphic origin of anastomosing and wavy laminas overprinting putative microbial deposits from the 3.22 Ga Moodies Group (Barberton Greenstone Belt)”, in Precambrian Research, volume 362, Elsevier BV, →DOI, archived from the original on 04 Jun 2024, page 106306

   This is the first report from the Alps of eclogite-facies rocks of supposed Alpine age showing a granulite-facies metamorphic overprint, which is, in contrast, well documented in the Variscan belt.

   2018 January, Simone Tumiati, Stefano Zanchetta, Luca Pellegrino, Claudia Ferrario, Stefano Casartelli, Nadia Malaspina, “Granulite-facies Overprint in Garnet Peridotites and Kyanite Eclogites of Monte Duria (Central Alps, Italy): Clues from Srilankite- and Sapphirine-Bearing Symplectites”, in Journal of Petrology, volume 59, number 1, Oxford University Press (OUP), →DOI, archived from the original on 14 Nov 2023, pages 115–151

present singular third person overprints · participle present overprinting · participle past overprinted · past overprinted

1. To print over what has already been printed.

   This is the way overprinting works on the ZX Spectrum: two papers or two inks give a paper, one of each gives an ink. This has the interesting property that if you overprint with the same thing twice you get back what you started off with.

   1982, Steven Vickers, Robin Bradbeer, Sinclair ZX Spectrum: BASIC Programming

2. transitivehobbiesTo add an overprint to (a stamp).
3. by analogygeographyTo superimpose a new set of petrological, structural, and/or mineralogical characteristics onto rock by the action of geological processes over deep time.

   Furthermore, these rocks are overprinted by seafloor weathering, which provides a challenge to reconstructing serpentinization processes.

   2024 August, C. Johan Lissenberg, Andrew M. McCaig, Susan Q. Lang, Peter Blum, Natsue Abe, William J. Brazelton, Rémi Coltat, Jeremy R. Deans, Kristin L. Dickerson, Marguerite Godard, Barbara E. John, Frieder Klein, Rebecca Kuehn, Kuan-Yu Lin, Haiyang Liu, Ethan L. Lopes, Toshio Nozaka, Andrew J. Parsons, Vamdev Pathak, Mark K. Reagan, Jordyn A. Robare, Ivan P. Savov, Esther M. Schwarzenbach, Olivier J. Sissmann, Gordon Southam, Fengping Wang, C. Geoffrey Wheat, Lesley Anderson, Sarah Treadwell, “A long section of serpentinized depleted mantle peridotite”, in Science, volume 385, number 6709, American Association for the Advancement of Science (AAAS), →DOI, pages 623–629

   2 more examples

   Dominantly dextral shearing in the Chester zone occurred during post-Acadian plate adjustments around ca. 380 Ma (Ghanem et al. 2016), coeval with initial activity along the Norumbega fault system to the southeast and the shear fabrics overprint rocks on both upper and lower plates of the original thrust.

   2017 March, Allan Ludman, John T. Hopeck, Henry N. Berry IV, “Provenance and paleogeography of post-Middle Ordovician, pre-Devonian sedimentary basins on the Gander composite terrane, eastern and east-central Maine: implications for Silurian tectonics in the northern Appalachians”, in Atlantic Geology, volume 53, University of New Brunswick Libraries - UNB, →DOI, archived from the original on 25 Feb 2024, pages 063–085

   Although deformation overprints volcanic construction, several structural patterns are considered to be inherited from the pre-existing volcanic architecture.

   2012 September, W.U. Mueller, R. Friedman, R. Daigneault, L. Moore, J. Mortensen, “Timing and characteristics of the Archean subaqueous Blake River Megacaldera Complex, Abitibi greenstone belt, Canada”, in Precambrian Research, volumes 214–215, Elsevier BV, →DOI, archived from the original on 26 Apr 2024, pages 1–27

4. transitiveTo print too many copies of.

   The unpopular comic book was overprinted, leaving many retailers with dozens of unsaleable copies.

5. mediaTo overlap different colours to avoid gaps.