PPT-Geologic History of Texas Lab Exam

Earth amp Space Science Wednesday 27 February 2013 For your Reference 1 These dunes along Padre Island formed 18 Billion years ago 542 million years ago MYA 65 MYA 1 MYA Less than 12000 years ago. The strobe G input must be at a low logic level to enable the data selectionmultiplexing function A high level at the strobe terminal forces the W output high and the Y output low The SN54F151B is characterized for operation over the full military GEOL 2110. Lecture 2. Scales of Time and Change. Major Concepts. Geological events cover huge amounts of time that are hard to grasp in the span of human life. We tend to focus on dramatic, short-lived geologic events that we witness and are unaware of subtle, but geologically important events . Textbook for geologists (2002). Geologic map of the Sheep Mt. Anticline, Wyoming, based on air photos.. From . Banjeree. and . Mitra. . 2004. AAPG Bulletin 88(9):1227-1237.. What are the primary applications of aerial photographs for geologists?. How long ago were the dinosaurs here? How do we even describe geologic time anyway?. EONS. which are divided into . ERAS. ,. which are divided into. . PERIODS. ,. which are divided into. . EPOCHS. Mapping, spectroscopy and geologic analysis of Earth’s “sister” planet. Venus. The Basics, pre-1960. Radius 95% of Earth, mass 82%. 92X Earth atmospheric pressure, 97% CO2. 462°C surface temp. Mesozoic. Cambrian and Ordovician. Cenozoic. Pre-Belt. Pre-Cambrian. Paleozoic. Page. 1. Geologic Timeline . For example, using fossils, geologists can compare certain geologic strata in Montana with the "type section" of Devonian age rocks in Devon, England and determine that their ages are the same. Radiometric dates tell us that Devonian rocks fall in a range of 369–410 million years ago.. By Paula . Waggy. Franklin High School. With students working in pairs, pass the cardboard or . styrofoam. strips with insects pinned to them but in the wrong time periods. As an alternative, students can use their own insect collections and receive empty strips.. “Civilization exists by geologic consent” -Will Durant. Where are the world’s great cities located and why?. Why are Earliest Humans Here?. East African Rift. Water. Animals. Preservation of fossils. The geologic time scale divides Earth’s long history into units of time…. Eras. .  . Periods. .  . Epochs. Eras. are divided into . P. eriods. .. Periods. are divided into . Epochs. .. Precambrian. Why is starch agar used?. -To see if saliva was present and broke down the starch.. Positive control . –used to show what the change looks like. Negative control. – used to what no change looks like. Jacob Bleacher. Goddard Space Flight Center. 3. rd. Affordable Mars Workshop. Dec. 2, 2015. Geologic field work can be loosely defined as the body of work necessary to:. Determine the spatial distribution, age and attitude of the rock types within an area. Section 12.1 Discovering earth’s history. Uniformitarianism – the idea that physical, chemical, and biological laws that operate today also operated in the past; the present is the key to the past.. Normally we think of time in terms of days or years but geologists commonly refer to events that happened millions or billions of years ago. For example earth is approximately 4.6 billion years old. GEOLOGIC TIME. What is it and Why do we care? . What is the geologic time scale? . . Geologic Time Scale:. A record of the Earth’s . history broken up into . various units of time that. are based on types of . fossils contained within .