Mesozoic

the Cretaceous-Tertiary extinction, was a mass extinction over unknown origin that took out an estimated 60-75 percent of all the species on earth 66 million years ago, most famously the dinosaurs. It was the end of the Cretaceous period and the Mesozoic Era and created the beginning of the Cenozoic Era that is still happening today. Geologically speaking this extinction happened in a very short amount of time. Although the most well known species to go extincted during this time was the…

Yosemite National Park was first protected in 1864 and has since been a fascinating landscape that can be observed by people from all over (NPS). The formation of Yosemite Valley has been a natural phenomena for millions of years, formed by some of Earth’s most compelling geological sources. Yosemite has many beautiful granite formations and glacier-carved landscapes that attract everyone from artists to geologists (Huber, 1987). Yosemite Valley was formed by a series of different forces…

However, fossil records of the multicellular organisms suggest slow diversification rate at Precambrian, moderate at Paleozoic and high to exponential diversification rate at Mesozoic and Cenozoic. According to Benton (1995), diversification is not a stochastic but continuous process and taxonomic group/clade addition and multiplication plays a major role in diversification along with adaptation to new habitats. Based on the analysis…

is the second leading cause of death in the United States, and kills more than 500,000 Americans every year. If you haven't figured out what's being talked about already, it's cancer. Cancer is a cureless disease that has caused problems since the Mesozoic era. It is a well-structured disease that knows how to spread everywhere, even after special treatments are used to reduce or eliminate the cancerous cells. But with all the advancements of medical science made in the 21st century, it still…

How Flowers Changed the World: A Review “How Flowers Changed the World” is an essay written by American anthropologist, Loren Eiseley, from his 1957 classic, The Immense Journey, regarding the pivotal role of flowers in the evolution of life. It is an informative and interesting essay that showed the importance and evolution of angiosperms through a factual timeline in a vivid manner that makes us realize our own relationship with nature. This essay about the rise of angiosperms and how they…

590 feet. This area is very green and forestry with many unusual and colorful birds, owls, frogs and butterflies. The Sierra de los Órganos mountain range located in western Cuba is about 40 miles long. They are low range hills that still have Mesozoic marine limestone. . Other mountain ranges are the Sierra Crystal in the southeast, the Escambray Mountains in the central area, and the Sierra del Rosario in the northwest. Cuba’s largest natural freshwater lake is Laguna de Leche at 25.9sq…

Your 5-year-old German Shepard is not as active as he has once been. Of course he 's getting older, we all are, but something isn 't right with him. It isn 't that same energetic pup who was excited to greet you at the door, bark at the delivery guy, and chase squirrels through the window. He 's starting to move slower, doesn 't really bother following you around when you 're having a snack for yourself, and his stride isn 't as proud as it has once been. Even though you figure it is just his…

Natural resources as an inseparable part of life play an undeniable role in the survival of human life. In this regard, soil is considered as one of the most important natural resources. Generally, Iran is one of the countries which face with different natural hazards such as landslides. A large part of Iran is formed by the mountainous areas. Tectonic and seismic activities along with various geological and climatic conditions have led Iran susceptible to the wide range of landslides. In this…

Connecticut River Valley (Figure 1). The purpose of these stops is to examine rocks, interpret depositional environments for each rock formation, and discuss the geologic history of the Deerfield Basin based on observations and interpretations. Early Mesozoic lithospheric extension led to the development of a long sequence of rift basins. The Deerfield basin is the erosional remnant of one of these rifts exposed in North America after Pangaea separated during the Carnian (Olsen et al., 1992).…

major zones: which is primarily dominated by the Archaean to Palaeoproterozoic cratonic shields, Palaeo to Mesoproterozoic fold belts, Meso to Neoproterozoic sedimentary basins, Palaeozoic rocks of the Tasman orogenic and the Great Artesian Basin Mesozoic rocks (Fig.…