Download e-book for iPad: Diagenetic bedding: a model for marl-limestone alternations by Werner Ricken

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Extra info for Diagenetic bedding: a model for marl-limestone alternations

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Cement layers, of and the of 42%; however, content original dissolved primary fraction differences limestone in increases carbonate, and porosity the then middle to 60% o f which was reprecipitated variations between layers the the of 5% ( s e e cemented which of the the carbonate. in the limestone section and composed limestone total contained in is the dissolved marl layers. 2), zones Fig. 27 Data from the Barremian Angles 3 section. a: Relationship between porosity and carbonate content. 4% and the formula for porosity used in Fig.

ANGLES. Maximum I o. I L ± ~ ---" I,~| ' I / %--~t i ~ I ~ ~ ~-~, / I 1 1 2 3 4 Fig. 25 Angles 3 section, Barremian, Vocontian Basin, French Maritime Alps. Columns: 1) weathering profile and sample numbers, 2) carbonate content, 3) compaction, 4) noncarbonate fraction, expressed as a percentage of the original s e d i m e n t v o l u m e (NCd). Calculations (eq. 2) correlates 26). 4%, in in diagram calculated contents in respectively). primary f r o m 74 t o 91% a n d an (Fig. 25) carbonate (Fig.

Compaction with 1 to these range outcrop Chondrltes, resisted been periodicities Superimposed in the Planolttes, overburden) foraminifera they undulation with carbonate fluctuation i n CaCO 3 15). , -^ '-,,u O° 3S o ' ~.... 09 I I r 5'o ' 6b ' 7b COCO3 Fig. 16 porosity. 4% c a r b o n a t e , higher beds, (Fig. although (Fig. in 16). amount of compaction (Fig. 17). 0%. The w as s l i g h t l y carbonate-rich now l o w e r by a s t a t i s t i c a l l y a relatively clay most decompacttng the primary can be e x p l a i n e d in the the 2) by the compared section This of eq.

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