A pattern of geophone groups used simultaneously to record data from a single shot. Examples of spreads include in-line, offset, interlocking, L-spread, reversed, split-spread, and T-spread. Seearray.
Geography
The slumping of clayey sediment at the edge of ice sheets.
Economics
The difference between the bid and offer prices quoted by a market-maker. The prices of securities at which market-makers are willing to sell are higher than those at which they are willing to buy. The spread has to cover the market-makers’ operating costs and provide profits, and includes a premium against the risk that any particular customer has insider knowledge about the security being traded. Spreads tend to be smaller on more widely traded securities.