Photomicrographs of thin sections of the Otorohanga Limestone. The scale line on No. 6 corresponds to approximately two millimetres in each thin section. (1) Poorly-sorted polyzoan biosparite. Member D, Section Sll. The skeletal fragments are tightly packed, but grain rupture due to compaction is minimal. (2) Well sorted, rounded polyzoan biosparite. Facies El, Section S28. Despite the apparently loose packing, the grains are in three-dimensional grain-support. Sparry calcite cement fills all the intergranular spaces. (3) Moderately sorted polyzoan-echinodermal biosparite. Facies E2, Section S24. (4) Moderately sorted polyzoan biosparite. Facies E3, Section S36. (5) Polyzoan, spar-rimmed biomicrite. Member F, Section Sll. Sparry calcite occurs as a rim around each allochem and fills most of the smaller intergranular spaces. Calcite-mud is present in the larger spar-rimmed cavities. (6) Slightly argillaceous (< 10 per cent), glauconitic mixed foraminiferal-polyzoan-echinodermal biosparite. Member G, Section Sll. Sample from the top few inches of the Te Kuiti Group. Note the abundant small globular Foraminifer tests.

Transactions of the Royal Society of New Zealand : Earth Sciences, Volume 8, Issue 1, 16 July 1970, Plate 4

Photomicrographs of thin sections of the Otorohanga Limestone. The scale line on No. 6 corresponds to approximately two millimetres in each thin section. (1) Poorly-sorted polyzoan biosparite. Member D, Section Sll. The skeletal fragments are tightly packed, but grain rupture due to compaction is minimal. (2) Well sorted, rounded polyzoan biosparite. Facies El, Section S2B. Despite the apparently loose packing, the grains are in three-dimen-sional grain-support. Sparry calcite cement fills all the intergranular spaces. (3) Moderately sorted polyzoan-echinodermal biosparite. Facies E2, Section 524. (4) Moderately sorted polyzoan biosparite. Facies E 3, Section 536. (5) Polyzoan, spar-rimmed biomicrite. Member F, Section Sll. Sparry calcite occurs as a rim around each allochem and fills most of the smaller intergranular spaces. Calcite-mud is present in the larger spar-rimmed cavities. (6) Slightly argillaceous (< 10 per cent), glauconitic mixed foraminiferal-polyzoan-echinodermal biosparite. Member G, Section Sll. Sample from the top few inches of the Te Kuiti Group. Note the abundant small globular Foraminifer tests.