Characters

Kaman-Shilotter

Sativli 194 hill

Saphale

Nandgaon Murba

Clast/fragment size

Average size 2 to 64 mm 10% to 15% > 64 mm, maximum lm

2 to 64 mm

Upto 64 mm

Murba, mainly lapilli size max. 64 mm

Composition of clast

Basalt, dolerite gabbro, subordinate cherty, siliceous.

Basalt, dolerite, gabbro, diorite, cherty, pumice

Basalt, GPB, gabbro, diorite, dolerite.

Tuffaceous lapilli, basalt, subordinate gabbro,

Shape of Pyroclasts

Sub-angular to angular, bigger ones are more angular, chilled margms

Bombs of various shapes, fragments of bombs, smaller fragments angular.

Subangular to blocky, basaltic blocks

Various shaped bombs, ribbon, spherical and spindle.

Matrix

Basaltic, gray with angular clasts of cherty and soot material, size gradation at

places

Tuffaceous glassy, small lapilli of siliceous material with chilled margins

Basaltic, occasional radish clayey muddy.

Basaltic, occasionally muddy.

Welding, compaction, cohesiveness

Cohesive with magmatic character, finer flows have tuffaceous matrix.

Very well welded glassy nature, coarser parts are magmatic and cohesive.

Well consolidated, open framework.

Vitreous nature, magmatic with patches of muddy matrix, less welded

Depositional structures

Massive with occasional gravity bedded, basalt boulders aligned parallel to beds, vitreous tuff beds

Massive, small sectors contain compositionally banded tuffs with planar bedding, bedding sags

Non bedded massive

Massive non bedded

Geometry of the deposit

Sheet, with localized circular to semicircular out crop.

Sheet, inter-layered with tuffs

Wedge shaped with circular out crops

Lenticular, lensoid.

Associated facies

Basalticflows, pumiceous layer on top, pockets of tuff present, interlayered with basic vitric tuff bands, acidic dykes

Thinly bedded compositionally banded tuffs, basalt flows, acidic dykes.

Basaltic flows, gabbro intrusives.

Basaltic flows, plugs of basaltic nature dyke swarm.

Vesicularity

of clasts

Scoraceous

Vesicular basalt fragments., small pumice fragments, vesiculated acidic tuff fragments with non vesicular blocks and smaller fragments of all.

Scoraceous fragments of basalt and soot material occasional pumice fragments along with non vesicular fragments.

Scoraceous basalt fragments and scoraceous lava soot material, occasional pumice fragments Besides non vesicular fragments of all.

basalt, pumice, vesiculated tuffaceous clasts, non-vesicular blocks of dolerite, gabbro, and acidic rocks and vein quartz.

Relation with the associated facies.

Gradational, conformable and interfingering relation with the associated rocks

Conformable but not gradational, interlayerd with compositionally banded and felsic/flows

Gradational with basalt. Housed within the basaltic pile.

Gradational with the basalt flows, encompassed within the flows itself.