Boulder clay is an unsorted agglomeration of clastic sediment that is unstratified and structureless and contains gravel of various sizes, shapes, and compositions distributed at random in a fine-grained matrix.

till, in geology, unsorted material deposited directly by glacial ice and showing no stratification. Till is sometimes called boulder clay because it is composed of clay, boulders of intermediate sizes, or a mixture of these.

Boulder clay: sometimes called till, this is soil of a glacial origin consisting of a very wide range of particle sizes, from finely ground rock flour to boulders. You might find these chapters and articles relevant to this topic.

Boulder clay is the name of the rock material carried at the bottom of a glacier or ice sheet, and left behind as 'stony soil' after the glacier or ice sheet melts away. The material contains both boulders (meaning anything from stones upwards) and clay (very fine material) because of the way a glacier works.

Boulder Clay refers to the glacial ablation-sublimation till that overlays a body of "dead" glacier ice in an ice-free area called Boulder Clay, located at the Northern Foothills in Antarctica. AI generated definition based on: Earth-Science Reviews , 2023

May 8, 2018 · boulder clay A glacial deposit that consists of boulders of varying size in a clay-dominated matrix, laid down beneath a valley glacier or ice sheet. Typically it is unstratified and unsorted, and characterized by rock types derived from the …

The meaning of BOULDER CLAY is an unassorted glacial deposit containing much clay in the matrix surrounding pebbles, boulders, and other rock fragments : till.

BOULDER CLAY, in geology, a deposit of clay, often full of boulders, which is formed in and beneath glaciers and ice-sheets wherever they are found, but is in a special sense the typical deposit of the Glacial Period in northern Europe and America.

Jun 23, 2024 · Till, also known as glacial till, is a type of unsorted material that is deposited directly by glacial ice and shows no stratification. It is sometimes referred to as boulder clay due to its composition of clay, intermediate-sized boulders, or a mixture of these materials.

Most till consists predominantly of clay, silt, and sand, but with pebbles, cobbles, and boulders scattered through the till. The abundance of clay demonstrates lack of reworking by turbulent flow, which otherwise would winnow the clay. [6]