geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Lithostratigraphy and mapping of metamorphic and volcanic rocks


, : Lithostratigraphy and mapping of metamorphic and volcanic rocks. Spisanie na Bulgarskogo Geologichesko Druzhestvo 66(1-3): 127-142

In relation to the geological mapping of Bulgaria in scale 1:50 000 a subject is discussed, which is not traditional for the stratigraphic classification and terminology. Three approaches for identification of units are compared with respect to the metamorphic rocks: lithostratigraphic (sensu lato)--layered and nonlayered, lithodemic and lithotectonic. The difference in the definition of the mixed rock unit (formal complex) between the Stratigraphic Code of Bulgaria and the International Stratigraphic Guide leads to significant difference in the term scope. There are two approaches for division and mapping of volcanic rocks--traditional lithostratigraphic approach and selection of volcanic complexes around volcanic centres. Some changes in the Stratigraphic code of Bulgaria seem reasonable, in most cases they also differ from the concepts of the International Stratigraphic Guide: 1. Separating of the igneous rocks from the metamorphic rocks and their differentiation in two independent groups within the nonlayered (lithodemic) lithostratigraphic units with a different internal system organization and terminology. 2. Introducing new rank terms for the nonlayered metamorphic units. 3. Correcting or clarifying the definition for the formal complex as a lithographic unit for mixed rocks. 4. Including the volcanic complexes into category of lithostratigraphic units. 5. Presuming the possibility of combining different types (layered and nonlayered) lithostratigraphic units.

US$29.90


Other references

Park, H.L.e, Q.; Lee, C., 1980: Saponin pattern of Panax ginseng root in relation to stem color. Han'guk Nonghwa Hakhoe chi = Journal of the Korean Agricultural Chemical Society 23(4): 222-227

Argenio G.F.; Bernini G.P.; Vivaldi M.S.; Del Corso C.; Santoni R.; Franchi F., 1991: Naloxone does not modify fenfluramine induced prolactin increase in obese patients. OBJECTIVE: To evaluate whether the supposed physiological interaction between serotoninergic and opiodidergic pathways in the modulation of PRL release is preserved in human obesity, a pathological condition in which these two systems are greatly...

Winerman I.; Ezra S.; Man A.; Segal S., 1982: Limitations of jet ventilation through the laryngoscope. A series is presented of 100 patients who underwent direct laryngoscopy under general anesthesia. The preferred technique of ventilation is jet insufflation by an injector attached to the blade of the laryngoscope, as it provides the surgeon with...

Lamarra, N.; Ward, S.A.; Whipp, B.J., 1989: Model implications of gas exchange dynamics on blood gases in incremental exercise. In humans, arterial PCO2 (PaCO2) has been demonstrated to be regulated at or near resting levels in the steady state of moderate exercise (i.e., for work rates not associated with a sustained lactic acidosis). To determine how PaCO2 might be expec...

Anonymous, 1980: Community medicine: a second chance?. British Medical Journal 281(6244): 826-826

de Waard, F., 1977: Relationships between the epidemiology and endocrinology of mammary carcinoma. Frontiers of Hormone Research 5: 145-154

Funkhouser, J.M., 2011: In situ hybridization analysis of transgenic tissues. In situ hybridization (ISH), also called in situ hybridohistochemistry (ISHH), has been used since the 1970s to localize mRNA within a tissue. This technique is now routine in many laboratories, and some standard procedures are emerging.

Bhatt, D.; Chowdhury, H.; Goswami, A., 2017: Atom-Economic Route to Cyanoarenes and 2,2'-Dicyanobiarenes via Iron-Catalyzed Chemoselective [2 + 2 + 2] Cycloaddition Reactions of Diynes and Tetraynes with Alkynylnitriles. An efficient protocol for the synthesis of cyanoarenes has been developed via an iron-catalyzed chemoselective [2 + 2 + 2] cycloaddition reaction of diynes with alkynylnitriles under mild reaction conditions with good to excellent yields. The reac...

Busch, M.J.; Kobayashi, K.; Hoyng, P.F.; Mittag, T.W., 1993: Adenylyl cyclase in human and bovine trabecular meshwork. Purpose. To determine the basic characteristics and responses of adenylyl cyclase in trabecular tissues. Because the second messenger cyclic adenosine nionophosphate can lower intraocular pressure by increasing outflow facility, it is of interest...

Chen, B-Wei.; Chang, S-Ming.; Huang, C-Yao.; Chao, C-Hua.; Su, J-Hsin.; Wen, Z-Hong.; Hsu, C-Hsin.; Dai, C-Feng.; Wu, Y-Chang.; Sheu, J-Horng., 2010: Hirsutalins A-H, eunicellin-based diterpenoids from the soft coral Cladiella hirsuta. Eight new eunicellin-base diterpenoids, hirsutalins A-H (1-8), were isolated from the soft coral Cladiella hirsuta. Their structures were elucidated by spectroscopic methods, particularly in 1D and 2D NMR experiments. The absolute configuration of...