Present work includes identification of lithofacies and reconstruction of depositional environments including controls of tectonics, and energy condition of the medium on sedimentation pattern of alluvial deposits of Purna basin, central India. The basin exhibits good development of dominantly areno-argillaceous sediments along with restricted occurrences of boulder-pebbly lithounits, covering together an area of 6,522 km². These sediments are also characterized by preservation of various calcrete morphotypes, vertebrate remains and Youngest Toba Tuff (YTT) ash in certain stratigraphic units. The work is based on detailed field and lithological studies of 20 river-cut sections exposed along the course of Purna river, representing entire alluvial deposits in both vertical and lateral profiles. Three lithofacies associations have been identified, i.e., (1) gravelly facies association (FA-1), (2) sandy facies association (FA-2) and, (3) silty-clayey facies association (FA-3). These associations consist of total 10 lithofacies distributed as: (i) matrix supported massive gravelly (Gmm) facies, (ii) matrix supported gravelly (Gmg) facies, (iii) horizontally stratified gravelly (Gh) facies, (iv) planar stratified gravelly (Gp) facies (FA-1), (v) horizontal sandy (Sh) facies, (vi) planar cross stratified sandy (Sp) facies, (vii) low angle cross bedded sandy (Sl) facies, (viii) massive sandy (Sm) facies (FA-2), (ix) laminated sandy (Fl) facies, and (x) palaeosol (P) facies (FA-3). Various architectural elements have also been identified. Based on lateral and vertical profiling of the lithofacies architecture, it is interpreted that gravel dominated facies in the mountainous region of the basin area are deposited by medium to high energy debris flow,whereas sandy and silty-clayey facies in the plain area are because of saltation and suspension modes of deposition under medium to low energy condition of depositing medium. The tectonic and topographical controls are well reflected on the sedimentation pattern and the same has been illustrated by proposing a model. Discussions along with the model have also been made on the progressive development of bazada or, pediment zone along the northern margin of the basin marked by the foothills of Satpura mountain ranges.

中文翻译：

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显示构造和河流环境能量条件对相构造的影响的模型：以印度中部普尔纳盆地第四纪冲积层为例

目前的工作包括岩相识别和包括构造控制在内的沉积环境的重建，以及印度中部Purna盆地冲积物沉积模式下介质的能量条件。该盆地表现出主要为非泥质沉积物的良好发育，同时出现了卵石卵石碎屑单元的出现受限，覆盖面积为6,522 km ²。这些沉积物的特征还在于在某些地层单位中保留了各种具体的形态，脊椎动物遗骸和最年轻的鸟羽凝灰岩（YTT）灰分。这项工作是基于对沿普纳河河道暴露的20条河道切割断面的详细野外研究和岩性研究，这些断面代表了垂直和水平剖面上的全部冲积物。已经确定了三个岩相协会，即（1）砾石相协会（FA-1），（2）沙质相协会（FA-2）和（3）粉质-粘土相协会（FA-3）。这些关联由总共10个岩相组成，分布为：（i）基质支持大量砾石（Gmm）相，（ii）基质支持砾石（Gmg）相，（iii）水平分层砾石（Gh）相，（iv）平面分层砾石（GP）相（FA-1），（v）水平砂质（Sh）相，（vi）平面交叉分层砂质（Sp）相，（vii）低角度交叉层状砂质（Sl）相，（viii）大型砂质（Sm）相（FA-2）， （ix）层状砂岩（Fl）相和（x）古土壤（P）相（FA-3）。还确定了各种建筑元素。根据岩相构造的横向和垂直剖面，可以解释为盆地中山区砾石为主的相是由中至高能泥石流沉积的，而平原区的砂质和粉质黏土相则是由于在中等至低能条件下沉积介质的盐析和悬浮模式。构造和地形控制在沉积模式上得到了很好的反映，并且通过提出模型对此进行了说明。