The "shale" is a sedimentary rock known as mudstone, and the "oil" is a waxy solid called kerogen. From Wordnik.com. [Aspen Times - Top Stories] Reference
It is created by minor metamorphism of shale or mudstone. From Wordnik.com. [Metamorphic rock] Reference
Where it cut the low banks, the rock looked like mudstone. From Wordnik.com. [Futures Imperfect]
The eggshells in the fossilized mudstone nests were totally mashed. From Wordnik.com. [New Theories And Old Bones Reveal The Lifestyle Of The Dinosaur] Reference
"You can see the tilt and the mudstone on the log, and I'm on, canceling the subsurface.". From Wordnik.com. [Futures Imperfect]
Marine mudstone and sandstone of Miocene-Pliocene origin form two hilly areas in the west. From Wordnik.com. [Tongariro National Park, New Zealand] Reference
From there we had lunch, then went to a mudstone outcrop where we found hundreds of brachiopods. From Wordnik.com. [worlds in a grain of sand] Reference
The soils are largely infertile wind-redistributed grey and red sands over mudstone and clay pans. From Wordnik.com. [Greater St Lucia Wetland Park, South Africa] Reference
Far across the river delta, snow and ice clung to the siltstone and mudstone clefts of Franklin Bluffs. From Wordnik.com. [The Great Alaskan Cast and Blast] Reference
The ground turned paler, and I ran a geological and got a mix of gypsum and sulfur in with the mudstone. From Wordnik.com. [Futures Imperfect]
The Appekunny Formation is a 1.375 to 1.4 Ga mudstone, and is often referred to as the Appekunny argillite. From Wordnik.com. [Archive 2008-08-01] Reference
The Limestone Plains ecoregion is composed of thin strata of Permian-age limestone, sandy limestones, and mudstone. From Wordnik.com. [Ecoregions of Texas (EPA)] Reference
In 2004-2005 an articulated Apatosaurus was removed from maroon mudstone in the Twin Juniper Quarry in Rabbit Valley. From Wordnik.com. [Archive 2009-05-01] Reference
Dolomitic drift and meltwater deposits are characteristic and overlie limestone, calcareous shale, and dolomitic mudstone. From Wordnik.com. [Ecoregions of Indiana and Ohio (EPA)] Reference
The stone type quarried is unique to the Sarikaya quarry, as it can be microscopically classified as radiolarian mudstone. From Wordnik.com. [Interactive Dig Sagalassos - Geological Survey Report 1] Reference
Anyway, the ground was a very light grey, almost purple in places, a weathered clay or mudstone or siltstone of some sort. From Wordnik.com. [One of those WoW things.] Reference
It includes chalky limestones, siliceous earths, red clay, and, at the top, a layer of mudstone composed mainly of volcanic dust. From Wordnik.com. [Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon"] Reference
Soils formed from claystone, shale, sandstone, and mudstone are found west of Meeker, and in the Colorado River valley near Rifle. From Wordnik.com. [Ecoregions of Colorado (EPA)] Reference
By the time its jaws were within striking range, the monster's entire body had grown as drab and motionless as a mudstone sculpture. From Wordnik.com. [The Veiled Dragon]
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 surface geology of Sumba is composed primarily of sandstone and mudstone, with some igneous intrusions overlain by recent limestone. From Wordnik.com. [Sumba deciduous forests] Reference
The upper (Triassic) unit contains banks of sandstone, mudstone, siltstone and coal, probably laid down during a humid, cool climate in swamps, lakes and river channels. From Wordnik.com. [Tasmanian Wilderness, Australia] Reference
Chapter V. -- Curious pumiceous infusorial mudstone (page 118) of. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
BD08-01 42.3 48.5 6.20 Carbonaceous mudstone, sand, coal fragments. From Wordnik.com. [Marketwire - Breaking News Releases] Reference
BD08-04 27.40 36.70 9.30 Carbonaceous mudstone, sand, coal fragments. From Wordnik.com. [Marketwire - Breaking News Releases] Reference
The original mudstone seabed was subsequently uplifted to form the nearby coastal cliffs. From Wordnik.com. [Hawke's Bay Today] Reference
It was found in orange mudstone beds in the Junggar Basin in China's far western Xinjiang region. From Wordnik.com. [Signs of the Times] Reference
The oil and gas is going to act as a high pressure washer and erode away all the sandstone and mudstone. From Wordnik.com. [WN.com - Business News] Reference
Carbonaceous mudstone, sand, coal fragments includes 53.40 54.38 0.98 Continuous Coal with minor partings. From Wordnik.com. [Marketwire - Breaking News Releases] Reference
Many of the local hiking trails pass over mudstone or shale and a good rain turns them into a claylike muck. From Wordnik.com. [Ventura County Star Stories] Reference
This figure was used for a projected pit design under limiting constraints of minimum mudstone and sterile deposits. From Wordnik.com. [Canadian Mining Journal - Headline News] Reference
Landscaping will borrow from the Murray River location with mudstone walls and the retention of the existing mature gum trees. From Wordnik.com. [The Border Mail - Front Page] Reference
The erosion by wave action of mudstone, comprising local bedrock and landslides, frequently exposes embedded isolated boulders. From Wordnik.com. [TravelPod.com TravelStream™ — Recent Entries at TravelPod.com] Reference
The drillhole intersected a 3-metre thick section of graphitic, iron-rich (pyrrhotite) mudstone at a drilled depth of 139.7 metres. From Wordnik.com. [Marketwire - Breaking News Releases]
The Pancake Rocks were formed by layers of limestone and thinner layers of mudstone that were uplifted from the sea a long time ago. From Wordnik.com. [TravelPod.com TravelStream™ — Recent Entries at TravelPod.com] Reference
The mudstone has been eroding quicker than the limestone from the sea, the rain and the wind, which gives the rocks the layered appearance. From Wordnik.com. [TravelPod.com TravelStream™ — Recent Entries at TravelPod.com] Reference
Schist, limestone, mudstone, sandstone, limestone, sandstone, unconformity, and more sandstone. From Wordnik.com. [Archive 2005-03-01] Reference
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