Ancient mud deposits harden over geological time to form sedimentary rock such as siltstone or solid, mudrock lutites. From Wordnik.com. [Yahoo! Answers: Latest Questions] Reference
Age assigned to dredged siltstone samples and piston core samples. From Wordnik.com. [Sea of Japan large marine ecosystem] Reference
The prehistoric "tool" was reassembled from 14 fragments of siltstone. From Wordnik.com. [28,000-year old multi-tasker] Reference
The region occurs on sandstone, siltstone, shale, and limestone substrates. From Wordnik.com. [Ecoregions of New Mexico (EPA)] Reference
The silt loam soils were derived from loess, siltstone, shale, or sandstone. From Wordnik.com. [Ecoregions of Indiana and Ohio (EPA)] Reference
Other less resistant rocks, such as shale and siltstone, form the side slopes. From Wordnik.com. [Ecoregions of Delaware, Maryland, Pennsylvania, Virginia, and West Virginia (EPA)] Reference
Other less resistant rocks, such as shale and siltstone, may form the side slopes. From Wordnik.com. [Ecoregions of Delaware, Maryland, Pennsylvania, Virginia, and West Virginia (EPA)] Reference
It is largely underlain by interbedded Pennsylvanian sandstone, shale, and siltstone. From Wordnik.com. [Ecoregions of Arkansas (EPA)] Reference
Ecoregion 69d is underlain by flat-lying Pennsylvanian shale, siltstone, sandstone, and coal. From Wordnik.com. [Ecoregions of Kentucky (EPA)] Reference
It is Pennsylvanian-age slate, siltstone and conglomerate that has been highly metamorphosed. From Wordnik.com. [Narragansett Bay National Estuarine Research Reserve, Rhode Island] Reference
It is underlain by massive Pennsylvanian sandstone, siltstone, and shale, and is largely unglaciated. From Wordnik.com. [Ecoregions of Illinois (EPA)] Reference
A siltstone floor, ceramics, and even intact bricks from the original buildings were soon discovered. From Wordnik.com. [Car Wash Cover-up] Reference
Ecoregion 38 is mountainous, forested, and underlain by Pennsylvanian sandstone, shale, and siltstone. From Wordnik.com. [Ecoregions of Arkansas (EPA)] Reference
They overlie nearly horizontal, Devonian age sandstone, siltstone, and shale of the Catskill Formation. From Wordnik.com. [Ecoregions of Delaware, Maryland, Pennsylvania, Virginia, and West Virginia (EPA)] Reference
The Red Prairie is nearly level to rolling and underlain by Permian sandstone, shale, gypsum, and siltstone. From Wordnik.com. [Ecoregions of Oklahoma (EPA)] Reference
The Rolling Red Hills (27q) ecoregion is mostly underlain by red, Permian-age sandstone, shale, and siltstone. From Wordnik.com. [Ecoregions of Oklahoma (EPA)] Reference
The rolling hills of the Northwestern Cross Timbers are underlain by Permian-age sandstone, siltstone, and shale. From Wordnik.com. [Ecoregions of Oklahoma (EPA)] Reference
The surface geology of this ecoregion is a combination of Miocene siltstone, conglomerate, volcanics, and limestone. From Wordnik.com. [Huon Peninsula montane rain forests] Reference
It is primarily underlain by flat-lying Pennsylvanian sandstone, siltstone, shale, and coal of the Pottsville Group. From Wordnik.com. [Ecoregions of Delaware, Maryland, Pennsylvania, Virginia, and West Virginia (EPA)] Reference
These in turn overlie Devonian age sandstone, siltstone, and shale of the Catskill Formation (Berg and others, 1980). From Wordnik.com. [Ecoregions of Delaware, Maryland, Pennsylvania, Virginia, and West Virginia (EPA)] Reference
The disjunct areas contain Cambrian-age sedimentary rocks of shale, sandstone, siltstone, conglomerate, and dolomite. From Wordnik.com. [Ecoregions of North Carolina and South Carolina (EPA)] Reference
Ecoregion 43 is largely an unglaciated, semiarid, and rolling plain that is underlain by shale, siltstone, and sandstone. From Wordnik.com. [Ecoregions of Montana (EPA)] Reference
The limestone, chert, siltstone, and shale is covered by soils that are cherty, acidic, and low to moderate in fertility. From Wordnik.com. [Ecoregions of Alabama and Georgia (EPA)] Reference
Precambrian units are widespread and consist of quartzite, schist, phyllite, conglomerate, dolomite, siltstone and sandstone. From Wordnik.com. [Tasmanian Wilderness, Australia] Reference
It is characterized by rolling valleys and low hills and is underlain mostly by shale, siltstone, and fine-grained sandstone. From Wordnik.com. [Ecoregions of Delaware, Maryland, Pennsylvania, Virginia, and West Virginia (EPA)] Reference
It is underlain by Mississippian limestone and shales and, in the west, by Cretaceous-Paleocene shale, siltstone, and sandstone. From Wordnik.com. [Ecoregions of Kentucky (EPA)] Reference
The mostly forested Hills of the Bluegrass ecoregion is underlain by Upper Ordovician calcareous shale, siltstone, and limestone. From Wordnik.com. [Ecoregions of Kentucky (EPA)] Reference
Tertiary sedimentary rock including sandstone and conglomerate are most extensive, but shale, siltstone, and limestone also occur. From Wordnik.com. [Ecoregions of Wyoming (EPA)] Reference
Ecoregion 71 is underlain by Mississippian-age through Ordovician-age limestone, calcareous shale, sandstone, siltstone, and shale. From Wordnik.com. [Ecoregions of Kentucky (EPA)] Reference
The light shades on this image (C) represent areas of limestone, while the darker regions (B) are composed of sedimentary siltstone. From Wordnik.com. [Remote sensing] Reference
During the Permian Period several thousand feet of brick-red shales, siltstone, sandstones, and gypsum were deposited in this region. From Wordnik.com. [Ecoregions of Kansas and Nebraska (EPA)] Reference
The lower (Permian) unit consists of glacio-marine sequences including tillite, sandstone, siltstone, mudstone and limestone horizons. From Wordnik.com. [Tasmanian Wilderness, Australia] Reference
The Southern Sandstone Ridges ecoregion encompasses the major sandstone ridges, but these ridges also have areas of shale and siltstone. From Wordnik.com. [Ecoregions of Tennessee (EPA)] Reference
The Prairie Tableland ecoregion is nearly level, dominated by cropland, and underlain by Permian red shale, soft sandstone, and siltstone. From Wordnik.com. [Ecoregions of Oklahoma (EPA)] Reference
Soils are alkaline or gypsum bearing and are derived from sedimentary rocks such as shale, sandstone and siltstone, or windblown material. From Wordnik.com. [Ecoregions of Wyoming (EPA)] Reference
The soils, formed from sedimentary rocks, such as shale, sandstone and siltstone, are also not as alkaline as those found in Ecoregion 18g. From Wordnik.com. [Ecoregions of Wyoming (EPA)] Reference
All of them lie atop mother rock of fractured sandstone and siltstone. From Wordnik.com. [CellarTracker Tasting Notes (all notes)] Reference
LearnThatWord and the Open Dictionary of English are programs by LearnThat Foundation, a 501(c)3 nonprofit.
Questions? Feedback? We want to hear from you!
Email us
or click here for instant support.
Copyright © 2005 and after - LearnThat Foundation. Patents pending.