In other words, the patterned portions of kurogaki consist of silicified wood.
Kazue Tazaki, Atsuko Fukuyama, Fumie Tazaki, Teruaki Takehara, Keiichi Nakamura, MasayukiOkuno, Yumiko Hashida, Shozo Hashida 2017, 'Electron Microscopy Observation of Biomineralization within Wood Tissues of Kurogaki',Mineralshttps://www.mdpi.com/2075-163X/7/7/123. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Phytoplankton containing biominerals, such as silicified diatoms have long been associated with high export fluxes.
Brivaëla Moriceau, Morten H. Iversen, Morgane Gallinari, Antti-Jussi O. Evertsen,Manon Le Goff, Beatriz Beker, Julia Boutorh, Rudolph Corvaisier, Nathalie Coffineau,Anne Donval, Sarah L. C. Giering, Marja Koski, Christophe Lambert, Richard S. Lampitt,Alain Le Mercier, Annick Masson, Herwig Stibor, Maria Stockenreiter, Christina L.De La Rocha 2018, 'Copepods Boost the Production but Reduce the Carbon Export Efficiency by Diatoms',Frontiers in Marine Sciencehttp://journal.frontiersin.org/article/10.3389/fmars.2018.00082/full. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Barite crystals are deposited close to the silicified core material.
Joyce Lundberg, Charles Brewer-Carías, Donald A. McFarlane 2018, 'On biospeleothems from a Venezuelan tepui cave: U-Th dating, growth rates, and morphology',International Journal of Speleologyhttps://scholarcommons.usf.edu/ijs/vol47/iss3/6/. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The concretions are silicified with abundant bitumen inside.
Xiaomei Wang, Shuichang Zhang, Huajian Wang, Donald E. Canfield, Jin Su, Emma U. Hammarlund,Lizeng Bian 2017, 'Remarkable Preservation of Microfossils and Biofilms in Mesoproterozoic SilicifiedBitumen Concretions from Northern China', Geofluidshttp://dx.doi.org/10.1155/2017/4818207. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The materials cropping out in this area include: siliceous sinter, agate, and silicified wood.
Otis Crandell 2014, 'Knappable materials in the Criș Valley, Romania', Journal of Lithic Studieshttp://journals.ed.ac.uk/lithicstudies/article/view/1101. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Numerous structures were silicified including cell walls, cell plates, plasmodesmata, and guard cells and stomata at varying stages of differentiation.
Exley Christopher, Law Chinnoi 2011, 'New insight into silica deposition in horsetail (Equisetum arvense)', BMC Plant Biologyhttp://www.biomedcentral.com/1471-2229/11/112. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
This area presents abundant lithic raw materials of very good quality for knapping including flint, chalcedony and silicified wood.
Manuel Enrique Cueto, Ariel David Frank, Fabiana Skarbun 2016, 'The exploitation of obsidian in the Central Plateau of Santa Cruz, Argentina: Resultsfrom La María and Cerro Tres Tetas and a regional perspective', Journal of Lithic Studieshttp://journals.ed.ac.uk/lithicstudies/article/view/1402. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Microscopic examination reveals a variety of microbial-looking, silicified filaments and cell casts embedded within the micro lamination of the structures.
Rafael López-Martínez, Ricardo Barragán, Hugo Beraldi-Campesi, Tomáš Lánczos, JuanR. Vidal-Romaní, Roman Aubrecht, Juan P. Bernal Uruchurtu, Teresa Pi Puig, Ramón Espinasa-Pereña 2016, 'Morphological and mineralogical characterization of speleothems from the Chimalacatepeclava tube system, Central Mexico', International Journal of Speleologyhttp://scholarcommons.usf.edu/ijs/vol45/iss2/2/. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
To a lesser extent, the mineralization also occurs disseminated within narrow, weakly silicified and sericited selvages.
Martínez-Abad, I., Cepedal, A., Arias, D., Martín-Izard, A., Fuertes-Fuente, M. 2015, 'Geology and mineralogy of the Au-As (Ag-Pb-Zn-Cu-Sb) polymetallic deposit of Valiña-Azúmara(Lugo, NW Spain)', Estudios Geologicoshttp://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/view/934/1051. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)