Snowball Earth

GG310 OCEANOGRAPHY Evaluate the geological evidence for so-called ‘Snowball Earth’ glacial episodes in the Precambrian and the hypothesis that these episodes were critical in the evolution of complex life. Introduction The importance of this period is that multicellular evolution began to accelerate after the last glacial ended.refbookpage829.The term Snowball Earth refers to the hypothesis that in the distant past, specifically the Cryogenian period (850-630 million years ago), the earth’s surface was entirely frozen from pole to pole. Evidence of a Snowball Earth comes from the presence of glacial deposits around the world that date back to the Cryogenian period (1). See Figure 1 for a temporal depiction of glaciations. Even though the…

The snowball Earth Theory was hypothesized by British geologist Brian Harland in 1964. The core ideal of the theory is that during the Pre-Cambrian period, the continents of the Earth were located near the Southern Hemisphere, and the entire planet was covered in glacial ice sheets, from the Poles to the equator (Schrag, et al., 2002). The following essay will aim to explain the theory of the Snowball Earth in detail. Brian Harland based his theory on the fact that he found glacial tillites with…

The Great Oxidation Event (GOE) occurred before the Neoproterozoic and lead to the oxygenation of the upper ocean, or parts of it. After this event however no further significant oxidation occurred meaning ocean oxygen introduced by the GOE is likely to have been used up by bacterial respiration, weathering and hydrothermal processes (Stern, et al., 2013). These processes could not have continued into the snowball Earth glaciations as the theory of snowball earth states a frozen sea must be…

His efforts as the dancing jack, however, were futile. His attempts to persuade Myrrhine seem to remain in wonderland as Myrrhine’s running away slaps him back to reality. Bergson calls this the snowball. It starts out small and “increases in size as it moves along” (Bergson 38). However, unlike the snowball effect, which builds upon itself through positive feedback, Bergson’s snowball eventually hits a rock and shatters. He argues that the snow ball makes people laugh because “every effort the…

Antarctica. But honestly, I could have cared less about how cold it was. At the time, I lived in southern California. It never gets actually cold there, no matter what time of year. I was assembling a snow fort preparing to be in the most epic of snowball battles with my sisters Lara and Alyssa. I had made over 15 snowballs and I was extremely proud of myself because I made them all on my own while my sisters were making theirs. “ Are you ready to be dominated?” my sister, Alyssa shouted. “…

“Reducto” the glacier blew up into a lot of tiny snowballs. I pushed a couple into my hat and whispered a spell into the hat. It was not a spell of Hogwarts or my own; It was one of Loks spells to keep freezing thing froze. With the hat of frozen snowballs in my pocket; I made a snowman with the others in the middle of the lake. I walked back to the rocky peak of the castle. Looking out at my snowman it looked lonely out there so I pointed my wand “geminio” I made him 3 friends. I smiled at my…

"Ahhhhh!" I scream as my brother throws an icy cold snowball at me. Rutherford County schools were closed for an entire week! Filled with snow cream, sledding, and binge-watching shows with puzzles. What a week it was! During my snow week, one of my favorite things to do was make snow cream! The complete deliciousness of this cream is unbelievable! The milk, sugar, and vanilla together make a dreamy flavor. The one problem is, snow cream is not something you can just want and get. Snow cream…

For example, according to World Health Organization (WHO), On 9 June 2016, Ebola virus that caused 11,310 of death tolls so far was witnessed most recently in the West African country, Liberia. (WHO) Actually, Ebola virus was only found in the Central African country, Congo. (Encyclopædia Britannica Inc.) Regarding the transmission, environmental news, Eco Watch said that since Liberia was one of deforestation countries, Ebola virus had been able to be transmitted to other regions. (EyobZiona)…

Ammonia above a small rocky core. Uranus is the third largest planet of the Solar System, and the coldest planet in the Solar System. Uranus is visible with a naked eye and appears to be a faint star under dark sky conditions. Orbit distance is 2,870,658,186 km and Orbit period is 30,687.15 Earth days. Uranus takes 84 Earth days to orbit the Sun, its axis is at 98 degrees, this means that the north and south poles of Uranus lie near the equator of earth. During parts of its orbit one or other of…

occurring but yet is not something that any of us should be intensely worrying about because it is a natural cycle of the earth. 650 million years ago the planet was a snowball and is referred to as an ice age. The albedo of earth was higher and no energy from the sun was being absorbed. This goes along with the fact that at this time there was nothing sitting in the atmosphere of earth except the particles necessary to keep earth the way it was. Earth was also…