Sentences with phrase «with calcite»

Not so fortunate are the coral with a calcite skeleton.

So a relatively positive outcome would be that organisms with aragonite skeletons gain the upper hand over those with calcite skeletons and manage to partly fill their niches in the ecosystem.

The oceans are alkaline because they are supersaturated with calcite and aragonite.

The limestone consists of similar skeletal fragments that have been cemented together with calcite to form a rock.

Simulating 1000 voyages between Norway and Greenland with varying cloudiness at summer solstice and spring equinox, we revealed the chance with which Viking sailors could reach Greenland under the varying weather conditions of a 3 - week - long journey as a function of the navigation periodicity Δt if they analysed sky polarization with calcite, cordierite or tourmaline sunstones.

The scientists worked with calcite (CaCO3), which has the same composition as chalk and marble and was one of the most abundant minerals in our planet's earliest days.

At the foot of a massive speleothem, or mineral deposit, they found the remains of two young men, their skeletons dismembered and encrusted with calcite.

Then one day in 2011, a Griffith University archaeologist named Adam Brumm noticed that some of the artwork was covered with calcite growths colloquially known as cave popcorn.

Not exact matches

Several types of minerals — especially ultrapure crystals of calcite, cordierite, and tourmaline — can split a beam of sunlight to form two images, with polarized light taking a slightly different path than the main beam.

This is best shown with the eyes, where even the single calcite crystal lenses survived intact.

Unlike typical crystal structures like shells, which incorporate thousands of smaller, geometrically symmetrical crystals attached to each other, each spine on a sea urchin is a single large calcite crystal with its own convoluted shape.

But they conclude that marine organisms with skeletons made of high - magnesium calcite may be especially susceptible to ocean acidification because this form of calcium carbonate dissolves more easily than others.

This guarantees further research into the topic, especially on the Mg - calcite solubility to further understand how organisms cope with these seawater conditions.

The team also showed that calcite associated with two seismic events in the earthquake cluster indicates very rapid carbon dioxide degassing, which can occur when fluid under high pressure is released — like opening the top of a shaken bottle of soda.

«Our research broadly suggests that those with skeletons made of aragonite have the coping mechanism — while those that follow the calcite pathway generally do less well under more acidic conditions.»

The 14C ages were corrected for mass - dependent fractionation with measured δ13C values, 33 and compared with samples of Pleistocene whale bone or calcite (backgrounds, > 48 14C kyr BP), late Holocene bison bone (∼ 1,850 14C BP), late AD 1800s cow bone and OX - 2 oxalic acid standards for calibration.

These spheres called micelles are molecules that roll up like roly - poly bugs based on the chemistry along their bodies — pointing outwards are the parts of their molecules that play well chemically with both the surrounding water and the calcite, while tucked inside are the parts that don't get along with the watery environment.

Ingredients: Crystal Essences of Carnelian, Orange Calcite, & Jasper in herbal tinctures of wild, fresh Hawthorne Berry, Motherwort & St. John's Wort blended with Hibiscus flower essence, spring water, organic grape alcohol & water from a sacred chalice well.

The effortless white beauty of cultured pearls combines with heavenly quartz and calcite gemstones alongside glass beads.

She combines dyed freshwater pearls with cool blue kyanite, smoky quartz, agate and dyed calcite.

Designed and crafted by Tiraphan Hasub, the bracelet is completed with petite brass beads that alternate with the beads of calcite.

She adds teardrop stones of watery blue calcite with

Calcite and reconstituted turquoise mingle with beads of faceted pyrite.

Tumbling in a joyous spray, quartz mingles with blue calcite and aquamarine.

This vibrant, colorful necklace is strung with beads of jasper, garnet, agate, and calcite on a length of braided cord.

Jasper and calcite combine in this pendant necklace with the colors of a brilliant blue sky over the earthen ground.

A star - burst of lapis lazuli petals forms an ethereal chrysanthemum centered with blue calcite and green and blue quartz.

Carnelian, jasper and quartz mingle with agate, calcite, amazonite and garnet on a graceful spiral.

Here is a Glistening 2008 Mercedes - Benz S550 AMG Sport Package in Calcite White with Black Leather Interior and Burl Maple Wood Trim, topped off with Brand New 22 ″ Road Force RF007 Wheels.

Other features included 18 - inch AMG light - alloy wheels in titanium grey with 285/55 R 18 wide - base tyres, bi-xenon headlamps, oval foglamps with a cornering light function and ISOFIX child seat attachments in the second seat row, scratch resistant body paint in calcite white, periclase green metallic and teallite blue metallic.

Here is a PRISTINE 2008 Mercedes - Benz G55 AMG KOMPRESSOR in Calcite White with Black Designo Leather Interior and White Stitching, Burl Maple Wood Trim, topped off with Matte Black Powder Coated Accents and 20 ″ HAMANN Wheels.

This morning, visit Barton Creek Cave and learn about how the cave served as a gateway to the underworld for the ancient Maya, and paddle a canoe along its aqueous passageways, studded with sparkling calcite crystals.

The structure was built using Chateau - Landon, a type of travertine stone which reacts with water to secrete calcite, which in effect bleaches the stone and keeps the building a bright, white colour.

Many artworks encourage interaction, such as Mr. Falls» Healing Pavilion, a seating area made from gemstones with healing properties like amethyst, orange calcite, jasper, lapis lazuli and rose quartz.

Foraminiferal or molluscan calcite dO18 can thus change with no change in SST, leading to mistaken derivations of T when a standard method is applied across the climatological boundary.

This acidification occurs in a region with a naturally low carbonate ion concentration, and studies suggest that the surface of the Southern Ocean will become undersaturated with respect to calcium carbonate minerals aragonite and calcite by the end of the century.

For example: how much of the O - 18 in the CO2 exchanges with O - 16 in the water used to process the calcite.

But since corals, be it with an aragonite or a calcite skeleton, both rely on symbiotic algae as their main source of energy they remain vulnerable, since those algae are highly susceptible to both low pH and high temperatures.