Proposal of a Methodology for the Preliminary Assessment of Kaolinitic Clay Deposits as a Source of SCMs

Using Ptolemaic to late antiquity pottery assemblages from Aswan (ancient Syene) as a case study, we demonstrate the imperative nature of petrographic analyses combined with geological field surveys when investigating ancient potting centres. The combination of archaeological (i.e. abundance of ceramics, vessel shapes etc.), macroscopic and natural-scientific methods allows the reconstruction of the possible extraction areas of clays utilised in Aswan, Upper Egypt. Knowledge of specific clays and their compositional characteristics helps to establish archaeometric reference groups, necessary for differentiating kaolinitic clay sediments of the Aswan area from similar geological environments further down the Nile valley.

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The Use of Clay Particle Morphology Studies to Characterize Industrial Clay Deposits: Examples from Brazil

Clay Minerals ◽

10.1180/claymin.1993.028.4.05 ◽

1993 ◽

Vol 28 (4) ◽

pp. 539-553 ◽

Cited By ~ 6

Author(s):

P. De Souza Santos

Keyword(s):

Particle Morphology ◽

Sao Paulo ◽

High Alumina ◽

São Paulo ◽

Optical Studies ◽

Clay Deposits ◽

Transmission Electron ◽

Kaolinitic Clay ◽

Ball Clays

AbstractThe use of transmission electron microscopy in association with other methods is described for the characterization of Brazilian industrial clays, especially kaolinitic-halloysitic clays. Examples are presented from: (a) tubular 7 Å-halloysites and the characterization of mixtures with ordered and disordered kaolinites in residual china clays; (b) tubular kaolinitic clay from Piedade, São Paulo; (c) platey 10 Å-halloysite from Poģos de Caldas, Minas Gerais; (d) rolled forms similar to 10 Å-tubular halloysite formed by repeated K Ac intercalation in well ordered kaolinite; (e) use of particle shape and size of kaolinite crystals in the São Simão, São Paulo ball clays as orientation for good sanitaryware ball clays; (f) characterization of gibbsite crystals in high alumina gibbsite/kaolinite clays; (g) antigorite as a clay mineral; (h) electron optical studies of thermal phase transformations involving tubular kaolinite, halloysites, antigorite, chrysotile, talc and pyrophyllite mono crystals.

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Hidden Cretaceous basins in Nova Scotia

Canadian Journal of Earth Sciences ◽

10.1139/e01-023 ◽

2001 ◽

Vol 38 (9) ◽

pp. 1335-1354 ◽

Cited By ~ 17

Author(s):

Rudolph R Stea ◽

Susan E Pullan

Keyword(s):

Nova Scotia ◽

Late Cretaceous ◽

Quartz Sand ◽

Seismic Data ◽

Tectonic Event ◽

Fine Grained ◽

Clay Deposits ◽

Kaolinitic Clay ◽

Middle Member ◽

Mesozoic Sediment

Early Cretaceous unconsolidated quartz sand and kaolinitic clay deposits in the lowlands of Nova Scotia are preserved in narrow half-grabens obscured by glacial drift. The Chaswood Formation sediments can be subdivided into three members; upper and lower members dominated by cyclical sandmud facies of fluvial origin and the middle member with lignitic clay of lacustrine origin. Ferruginous oxisols are common in the fine-grained facies of the upper and lower members. Seismic data indicate that Chaswood Formation strata in the Elmsvale Basin are deformed into steeply dipping faults and fault-related folds (Rutherford Road fault zone). An AptianAlbian age for this tectonic event is inferred from synsedimentary deformation and from the angular unconformity spanning the Late Cretaceous and Tertiary that truncates the Chaswood Formation. Exhumation of a thick cover of Mesozoic sediment (12 km) is needed to account for the preservation of Chaswood Formation outliers after ~80 Ma of erosion. The half-grabens that host the Chaswood Formation were formed in the Mesozoic and were antecedent to the present-day structurally controlled lowlands.

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The Experience of Cuba TRC on the Survey of Kaolinitic Clay Deposits as Source of SCMs—Main Outcomes and Learned Lessons

RILEM Bookseries - Calcined Clays for Sustainable Concrete ◽

10.1007/978-981-15-2806-4_1 ◽

2020 ◽

pp. 1-8

Author(s):

Adrián Alujas Díaz ◽

Roger S. Almenares Reyes ◽

Florencio Arcial Carratalá ◽

Luis A. Pérez García ◽

Carlos A. Leyva Rodríguez ◽

...

Keyword(s):

Clay Deposits ◽

Kaolinitic Clay

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Occurrence, Mineralogy, and Origin of the Lower Golden Valley Kaolinitic Clay Deposits Near Dickinson, North Dakota

Geological Society of America Bulletin ◽

10.1130/0016-7606(1962)73[1341:omaoot]2.0.co;2 ◽

1962 ◽

Vol 73 (11) ◽

pp. 1341 ◽

Cited By ~ 6

Author(s):

DONALD H. FREAS

Keyword(s):

North Dakota ◽

Clay Deposits ◽

Kaolinitic Clay

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Procedure for Maximizing Phonological Information from Single-Word Responses

Language Speech and Hearing Services in Schools ◽

10.1044/0161-1461.1504.267 ◽

1984 ◽

Vol 15 (4) ◽

pp. 267-274 ◽

Cited By ~ 25

Author(s):

Harriet B. Klein

Keyword(s):

Phonological Information ◽

Single Word ◽

Preliminary Assessment ◽

Target Attainment ◽

Phonological Processes ◽

Step Procedure ◽

Yield Information ◽

Assessment Measure ◽

Busy Clinician ◽

Planning Intervention

Formal articulation test responses are often used by the busy clinician as a basis for planning intervention goals. This article describes a 6-step procedure for using efficiently the single-word responses elicited with an articulation test. This procedure involves the assessment of all consonants within a word rather than only test-target consonants. Responses are organized within a Model and Replica chart to yield information about an individual's (a) articulation ability, (b) frequency of target attainment, substitutions, and deletions, (c) variability in production, and (d) phonological processes. This procedure is recommended as a preliminary assessment measure. It is advised that more detailed analysis of continuous speech be undertaken in conjunction with early treatment sessions.

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