Originating or produced in a place different from where it is found.

जिसका उत्पत्ति स्थान अलग हो।

English Usage: The allochthonous sediments in the riverbed were transported from distant mountains.

Hindi Usage: नदी के तल में मौजूद अल्लोक्टोनस अवसादन दूरस्थ पहाड़ों से लाए गए थे।