Definition of outcrop in English:


nounPlural outcrops

  • A rock formation that is visible on the surface.

    ‘dramatic limestone outcrops’
    • ‘In western Thailand and eastern Myanmar, Mesozoic rocks are scattered and discontinuous, and outcrops of Palaeogene rocks are very rare.’
    • ‘The main outcrops of this rock suite underlie the two steep-sided hills of the Boesmanskop to the immediate north of the main escarpment.’
    • ‘Around 110 km north of Arming there is a series of further outcrops of Lower Cambrian rocks.’
    • ‘The steep contacts and elongate outcrops of the Upper Jurassic and Lower Cretaceous complexes do not, therefore, rule out gently dipping, tabular form per se.’
    • ‘Traces of these explorations are still visible in the rocky outcrops on the ridge.’
    • ‘The northernmost outcrops consist of Ordovician chloritic slates, phyllitic metavolcanic rocks and slatey metapelitic rocks.’
    • ‘Scattered throughout the Mojave Desert, outcrops of Proterozoic sedimentary rock make up parts of the mountain ranges that divide this region into basins.’
    • ‘On the Witwatersrand the gold-bearing rock was discovered in outcrops on the surface, but within a few years it became clear that the deposits followed reefs deep underground sloping to the south.’
    • ‘On land, scientists may collect samples from rock outcrops.’
    • ‘Xenoliths, which are pieces of wall rock, or xenocrysts, which are single mineral grains that originate from xenoliths, can commonly be recognized at outcrops of magmatic rocks.’
    • ‘On the way we stopped to dive a rock outcrop that broke the surface a few hundred metres from shore.’
    • ‘As a boy, he loved to explore the teeming streets of Manhattan and South Bronx, checking out street excavations and rock outcrops in public parks for minerals.’
    • ‘Surrounding this lowlying area are ‘horsts’ of Palaeozoic rocks, and outcrops of Triassic conglomerates that drain into the basins of the Trent, Warwickshire Avon and the Severn.’
    • ‘Vistas of mountains and valleys with interesting weathered limestone outcrops are everywhere, and there are numerous small mines.’
    • ‘The round mound incorporates natural outcrops of rock.’
    • ‘Topographic and geological maps are the next stop to identify likely areas based on physical features such as sinkholes, known outcrops of cave forming rocks, and known cave locations.’
    • ‘Inselbergs are rock outcrops, several tens to several hundreds of metres high, emerging from savannas or rain forests.’
    • ‘He has also gone further afield including BC and Alberta in Canada, Utah, and Britain but his local crags are the limestone outcrops of the Niagara escarpment.’
    • ‘Although there are no outcrops of Devonian extrusive volcanic rocks in NW Scotland, they can be found in southern and central Scotland and the Orkney Islands.’
    • ‘Thus the proto-Thames once rose in the West Midlands and carried Welsh volcanic clasts southeastwards across the Middle Jurassic outcrops into the present west-east-striking valley in south Oxfordshire.’
    hillock, mound, rise, hummock, hill, hump, knob, tor, tump, barrow, bank, ridge, dune, elevation, acclivity, eminence
    View synonyms

verboutcrops, outcropped, outcropping

[no object]
  • Appear as an outcrop.

    • ‘He spies a campfire and walks over to it; underneath a rock outcropping, two men are taking refuge from the rain.’
    • ‘The walls of the passage were solid and rough, hewn from the granite outcropping upon which the Citadel stood.’
    • ‘At the camp's lowest point, a small rock outcropping serves as a storm shelter and sentry post.’
    • ‘From there a path twists its way through outcropping crags and tiny lochans to the summit, perched precariously on top of its own little crag.’
    • ‘Noticing another mineral outcropping about the same size as the one his team was hiding behind, the Captain quickly made a plan.’
    • ‘Steller sea lions lumber around the rock outcropping, while others lie still, looking like so many long sandbags.’
    • ‘An important hotel landmark was a large rock outcropping near the southeast corner of the building.’
    • ‘It sort of felt triumphant to be crawling up this stone outcropping after getting thrown into the river the second time.’
    • ‘A huge, bemused fiberglass giraffe looks down on the proceedings from a fake rock outcropping in the middle of the course.’
    • ‘In the rock outcropping, you notice grooves and wedge-shaped holes of varying sizes.’
    • ‘One morning I snuck up on a couple, keeping a big rock outcropping between myself and them, and when I came around the rock to find them, there was only one there.’
    • ‘The entrance gate was expertly hidden from the main path by a rock outcropping in the slope of the mountain.’
    • ‘The next year researchers returned to the spot and found that he had simply seen a rock outcropping that looked vertical from his position.’
    • ‘I immediately told members of my crew to stop what they were doing and to start hiking up the hill to our safety zone, a large rock outcropping.’
    • ‘At the very entrance of the cave there is a mammoth rock outcropping with a huge footprint.’
    • ‘Without warning the monolithic stone outcropping blew into a thousand fragments of flying rock.’
    • ‘The fact that older rocks progressively outcrop on the plateau surface to the NW suggests that the tilted surface is not a dip slope.’
    • ‘Back tire slurping and bouncing wildly, I kept going, finally slithering to a halt when I saw Jeff and Joe crouched under a rock outcropping.’
    • ‘Eventually it would have reached a weak spot in the terrain - a dip in the face, a rock outcropping - and broken off completely.’
    • ‘I was just relaxing on a nice rock outcropping when all of a sudden, this thing opens right behind me.’
    crag, cliff, tor, outcrop, outcropping
    View synonyms