Shaping of clay fragments during transport: a theoretical model

FAIMON, Jiří. Shaping of clay fragments during transport: a theoretical model. Online. Geologica Carpathica. Bratislava: SAV, 2005, 56/2005, No 5, p. 455-160, 6 pp. ISSN 1335-0552. [citováno 2024-04-23]

Basic information

• Original name: Shaping of clay fragments during transport: a theoretical model
• Name in Czech: Tvarování jílových závalků během transportu: teoretický model
• Authors: FAIMON, Jiří (203 Czech Republic, guarantor)
• Edition: Geologica Carpathica, Bratislava, SAV, 2005, 1335-0552.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10500 1.5. Earth and related environmental sciences
• Country of publisher: Slovakia
• Confidentiality degree: is not subject to a state or trade secret
• Impact factor: Impact factor: 0.449
• RIV identification code: RIV/00216224:14310/05:00031152
• Organization unit: Faculty of Science
• UT WoS: 000234072400006
• Keywords (in Czech): Česká republika; Rudické vrstvy; modelování; recentní procesy; sedimentologie; dno sedimentačního bazénu; jílový závalek
• Keywords in English: Czech Republic; Rudice Formation; modelling; recent process; sedimentology; basin bed; clay ball
• Tags: basin bed, clay ball, Czech Republic, Modelling, recent process, Rudice Formation, Sedimentology
• Tags: International impact, Reviewed

Abstract

Irregular blocks of cohesive clay (IBC) are transformed into spherical clay balls (SCB) during transport across a sedimentary basin bed by runoff. This transformation is controlled by rotation of the IBC about a randomly changing axis. During this process, deformation dominates; abrasion is less significant. Based on a theoretical model, the equation describing SCB formation, was derived in terms of the SCB instantaneous sphericity, Y, the IBC initial sphericity, Y0, the transport length, l, and the effective diameter, def. The equation was validated with the new data set obtained from IBC/SCB distribution along the transport path on the bed of an artificial basin (sandpit quarry). The coefficient k was found to be 2.9x10-4 and 4.8x10-4 for the shaping of two kinds of clays, respectively. Based on the proposed model, the length of transport can be estimated if sphericity and effective diameter are known. Despite the verification in the artificial setting, the presented model is valid also for the natural environment of various clay rich cliffs or scarps.

Abstract (in Czech)

Irregular blocks of cohesive clay (IBC) are transformed into spherical clay balls (SCB) during transport across a sedimentary basin bed by runoff. This transformation is controlled by rotation of the IBC about a randomly changing axis. During this process, deformation dominates; abrasion is less significant. Based on a theoretical model, the equation describing SCB formation, was derived in terms of the SCB instantaneous sphericity, Y, the IBC initial sphericity, Y0, the transport length, l, and the effective diameter, def. The equation was validated with the new data set obtained from IBC/SCB distribution along the transport path on the bed of an artificial basin (sandpit quarry). The coefficient k was found to be 2.9x10-4 and 4.8x10-4 for the shaping of two kinds of clays, respectively. Based on the proposed model, the length of transport can be estimated if sphericity and effective diameter are known. Despite the verification in the artificial setting, the presented model is valid also for the natural environment of various clay rich cliffs or scarps.

Links

• MSM0021622412, plan (intention): Name: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Acronym: INCHEMBIOL)

Investor: Ministry of Education, Youth and Sports of the CR, Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)