Field/Lab Assignment Part I
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The document describes 5 different rock samples collected by Roberto Vargas. The first sample is basalt, an extrusive igneous rock found near Parkfield, California. The second is a metamorphic rock called gneiss that has undergone regional metamorphism giving it a layered appearance. The third is an intrusive igneous rock, granite, found near Slack Canyon with quartz and feldspar. The fourth is a sedimentary limestone sample near a creek. The fifth sample is another extrusive basalt rock found on Parkfield Road, larger than expected.
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1) The document describes various rocks, geological features, and geological processes observed by the author. Samples include igneous basalt from Los Gatos Creek Park, sedimentary conglomerate and chert rocks, and metamorphic quartzite from La Rumorosa, Tijuana.
2) Additional observations include gravel from a creek bed, a dip-slip fault seen near the Kings River, stream erosion transporting rocks and sediment in Los Gatos Creek, rusting as an example of weathering on an outdoor metal tank, and a rock slide as an example of mass wasting along highway 198 near Coalinga, CA.
3) Details are provided on the location and descriptive features of each
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This document summarizes different types of rocks found in Parkfield, California through descriptions and photos provided by a geologist. It describes sedimentary rocks like marine sediment containing seashell fossils over 10 million years old. It also describes igneous rocks like volcanic rocks with gas pockets and granite from Yosemite. Additionally, it summarizes a metamorphic rock sample from the Calaveras formation displaying changes from heat and pressure. The document credits the geologist Andy Snyder for providing the rock samples and information.
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This document summarizes different types of rocks found near Parkfield, California. It describes sedimentary rocks like marine sediment containing seashells over 10 million years old. Igneous rocks discussed include volcanic rocks with gas pockets and different types of granite. A metamorphic rock sample is described as a Calaveras formation containing some marble. The document is thankful to a geologist for providing information and showing the rock samples.
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This document summarizes a geology field assignment completed by Norma Alvarez. It includes identification and descriptions of 5 rock samples collected from various locations. Samples include phyllite, andesite, granite, and sandstone. Descriptions of field observations of a fault, various weathering processes, mass wasting and erosion events, and different sedimentary environments are also provided. Examples given include frost wedging, oxidation, rock slides, and transitional, continental, and marine environments. The document concludes with photos of canal banks used for irrigation in farming, highlighting the practical use of geology.
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The document summarizes a student's field lab assignment where they collected rock samples from Little Panoche Reservoir. The student collected and identified samples of gneiss, iron ore, marble, pumice, and slate. Photos were also taken showing features like a normal fault in a hillside, the terrestrial lake environment, and examples of weathering like frost wedging and wetting/drying. The purpose of the field lab was to practice identifying rocks and geological structures in an outdoor setting.
Rocks geol 1
The document discusses different types of rocks:
1) Gneissic rock is a common type of metamorphic rock that forms from heat and pressure. It has a banded appearance due to light and dark minerals.
2) Quartz is a very hard metamorphic rock that forms from sandstone under high heat and pressure. It has a non-foliated texture of fused quartz grains.
3) Sandstone is a common sedimentary rock formed from compressed grains of sand. It accounts for 20% of sedimentary rocks and records clues about the environment in which it was formed.
Field assignment part 1
1) The student sampled rocks in the southern Sierra Nevada mountains in California, an area formed primarily of granite dating back to the Triassic period.
2) The first sample is identified as granite based on its coarse grain and black and white speckled pattern indicating high quartz and low feldspar content.
3) The second sample is identified as schist based on its smaller grain size and slight orange hue from iron oxide impurities.
Field assignment part 1
1) The sampling area was located in the southern Sierra Nevada mountains in California, which is primarily formed of granite dating back to the Triassic period.
2) The author analyzed 5 rock samples from the area, identifying one as granite based on its coarse grain and black/white pattern, another as schist based on its smaller grain and orange hue, and a third as marble based on its coloration from mineral impurities.
3) The other two samples were identified as limestone based on evidence of weathering, and quartzite based on its high quartz content and medium grain size formed under pressure and heat.
Geology rocks!
This document discusses a rock found in Hanford, California. The author examines the rock's physical properties and performs tests to determine it is basalt, an igneous rock. Basalt is common in the Lovejoy Basalt formation near the location it was found. The author believes the rock may have originated from that geological area.
Physical geology field assignment
The document provides details from a physical geology field assignment collecting rock samples from various locations in California. It describes 15 rock samples collected from creek beds and mines in Coalinga and surrounding areas. The samples include igneous, sedimentary and metamorphic rocks. Pictures are also included showing features related to faults, weathering, erosion and the historical Coalinga coal mine.
Geol3 part 1
David Pilcher collected various rock samples in California to fulfill a geology assignment. He traveled to San Luis Obispo County to study metamorphic rocks formed by the San Andreas Fault. He found hornfels along the coastal mountain ranges. Sedimentary rocks were found along the central coast, including sandstone and conglomerate collected from beaches. Igneous granite samples were easily accessible in the Sierra Nevada foothills near volcanic rock formations resulting from the subduction of tectonic plates millions of years ago. Through field observations and comparisons to online resources, David was able to identify the different rock types and understand how they relate to California's geological history.
1
The document summarizes the geology of the San Joaquin Valley in California. It describes how the valley formed 65 million years ago between two mountain ranges. Sediment from the Sierra Nevada filled the basin. The document also discusses the evolution of pill bugs from sea creatures with gills to land-dwelling crustaceans. Spider plants are described as having adapted from South African origins to survive drought conditions through a tuberous root system. Samples of igneous granite, metamorphic slate, and sedimentary shale rocks found in Fresno are presented along with their identifying characteristics.
Jahaira f. field proj.
This document contains descriptions of various geological features and samples observed in the field, including:
1) A sandstone rock sample found in Sequoia Park that is gray and black with tiny black crystals and lines.
2) A hornfels rock sample also found in Sequoia Park that is almost black with some light blue and green cracks.
3) A siltstone rock sample found at the Santa Cruz Boardwalk that has a pale color with small holes and black dots.
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- 1. Field/Lab Assignment<br />Part I<br />By: Roberto Vargas<br />The first rock is a sample of basalt, which is a type of Igneous rock. Basalt is a type of igneous rock that forms at Earth’s surface so it is an extrusive igneous rock. This sample was a dark green colored rock and is full of silicate minerals that contain a high amount of iron and magnesium. I found this rock while heading up to Parkfield, California. It was next to a really big rock which seemed to be basalt as well. <br />28575090805<br />This rock sample is a type of Metamorphic rock. I believe it is Gniess. This rock sample seemed to have gone through regional metamorphisim, which means that the crystals recrystallized with the orientation that is perpendicular to the direction of the compressional force. This gave the sample a sort of layered appearance or a foliated texture. I decided that this was a metamorphic rock because it clearly looked to me like this rock had changed its form.<br />438150304165<br />My third sample was an igneous rock. I believe this rock is granite. I believe this is grantie becaue of its texture and light colors. This is an intrusive rock that has a coarse-grained texture. This rock has silicate minerals quartz and feldspar. This type of rock is a major component of continental crust. I found this around Slack Canyon when I went on a field trip during the summer. This type of rock is mostly found to the west side of the San Andreas Fault.<br />352425161290<br />This rock sample is a sedimentary rock. I believe this is a limestone sample. This is a chemical sedementary rock which means that it was formed when material dissolved in water percipitates. This type of rock is mainly composed of the mineral calcite. I found this rock close to where I live near a creek. <br />28575033655<br />This rock sample is another igneous rock. This is a”plug” of basalt that is found on the Parkfield Road. Like my first sample this Basalt is alsoand extrusive igneous rock because it forms at Earth’s surface. It had a dark green color to it and like I mentioned it is located along the Parkfield road between the Fresno and Monterey county line and the Castle Mountain fault. I was really intriguid by this one because I would have never even thought that something this big could be basalt.<br />400050251460<br />