In an abrupt manner without giving notice or without the typical forms instantly
- rapidly and unexpectedly
- In an abrupt way; without giving notice, or without the usual types; unexpectedly.
(adv.) In an abrupt way; without giving notice, or with no usual forms; unexpectedly.
- (adv.) Precipitously.
Geologically considered, the country may be divided into three regions - a central, and the largest, comprising the whole width of the Aravalli system, formed of very old sub-metamorphic and gneissic rocks; an eastern region, with sharply defined boundary, along which the most ancient formations are abruptly replaced by the great basin of the Vindhyan strata, or are overlaid by the still more extensive spread of the Deccan trap, forming the plateau of Malwa; and a western region, of very ill-defined margin, in which, besides some rocks of undetermined age, it is more or less known or suspected that Tertiary and Secondary strata stretch across from Sind, beneath the sands of the desert, towards the flanks of the Aravallis.