The document describes work done on the Roaring Fork Trail in the Indian Peaks Wilderness to improve a river crossing and muddy area. Twelve volunteers and three Forest Service employees spent seven days building a new 32-foot-long bridge and 60-foot-long rock turnpike. Photos show the volunteers debarking logs, notching stringers, setting rocks, and hauling materials. The work eliminated muddiness and created a stable, sustainable surface for hikers and animals.
There are different types of stresses that can act on rock and cause it to change shape or volume, including tension, shearing, and compression. Faults occur along plate boundaries when the rock breaks, and can be normal faults when the rock pulls apart, reverse faults when the rock pushes together, or strike-slip faults when the blocks of rock move past each other sideways. The hanging wall is the block of rock above a fault, while the foot wall is below.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help boost feelings of calmness, happiness and focus.
The fieldtrip report summarizes observations and measurements taken during a geology fieldtrip to Keiyasi and surrounding areas in Fiji. Key findings include: fossil corals were found upright at Korotogo beach with measurements up to 8.7 meters high; sand dunes at Sigatoka showed evidence of ancient human settlement and were affected by trade winds; limestone was observed uplifted at Tuva formation; gullies measured up to 30.8 meters long with shear strength readings ranging from 0.08 to 0.43; terraces were found with heights ranging from 9.2 to 44.7 centimeters. Hot springs at Waibasaga had temperatures from 56.95 to 57.95 degrees Celsius and densities from
The document discusses rivers and the hydrological cycle. It begins by explaining how rivers are an important resource for drinking water, transport, electricity and more. It then describes the three main processes by which rivers shape the land - erosion, transportation, and deposition. Erosion involves wearing away river banks and breaking down rock particles. As rivers transport sediment downstream, larger rocks can be moved in higher energy areas near the source, while finer particles are deposited where energy is lowest at the mouth. The document outlines the typical features of the upper, middle and lower courses of a river as its energy decreases downstream.
This report summarizes a geology field trip to Malekhu, Dhading district in Nepal. Key findings include:
1. The group studied river channel morphology of the Trishuli-Thopal river confluence, observing features like meandering rivers, erosion and deposition banks, and a rock island where the rivers meet.
2. The report describes geological structures observed in the field such as faults, folds, joints and bedding. Fault types including normal, reverse, thrust and strike-slip are defined. Folds are classified based on limb dip, axial plane, and shape.
3. Rock and mineral samples were collected and studied, including igneous, sedimentary and metamorphic
GFW Memorial Flood Level Marker Photo EssayClancyPh
This document summarizes the construction of the Gilbert F. White Memorial Flood Level Marker from July to November 2010. It provides photos documenting the various stages of construction, including marking the site, digging the foundation, installing anchors, erecting scaffolding, adding glass levels, landscaping, and completion. The finished memorial is a solar-powered glass obelisk illuminating flood levels from Boulder's history along Boulder Creek.
Rivers go through three stages as they flow from their source to the sea - youthful, mature, and old. In the youthful stage, the fast-moving river erodes the landscape, creating V-shaped valleys, interlocking spurs, and waterfalls. During the mature stage, the river transports eroded material and deposits it, forming wider valleys, meanders, and flood plains. In the slow-moving old stage, deposition creates features like ox-bow lakes, levees, and deltas at the river's mouth. Rivers have long been important to people for transportation, water, and more recently, power generation through hydroelectric dams.
The document describes waterfalls located along the River Twiss and River Doe near Ingleton, North Yorkshire. It includes photos and questions about the geology and features of the waterfalls, such as the vegetation, relief, and erosion patterns visible. Differential erosion has created circular plunge pools below harder limestone bands. Over time, waterfalls will move upstream, leaving steep gorges as the erosion process continues.
There are different types of stresses that can act on rock and cause it to change shape or volume, including tension, shearing, and compression. Faults occur along plate boundaries when the rock breaks, and can be normal faults when the rock pulls apart, reverse faults when the rock pushes together, or strike-slip faults when the blocks of rock move past each other sideways. The hanging wall is the block of rock above a fault, while the foot wall is below.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help boost feelings of calmness, happiness and focus.
The fieldtrip report summarizes observations and measurements taken during a geology fieldtrip to Keiyasi and surrounding areas in Fiji. Key findings include: fossil corals were found upright at Korotogo beach with measurements up to 8.7 meters high; sand dunes at Sigatoka showed evidence of ancient human settlement and were affected by trade winds; limestone was observed uplifted at Tuva formation; gullies measured up to 30.8 meters long with shear strength readings ranging from 0.08 to 0.43; terraces were found with heights ranging from 9.2 to 44.7 centimeters. Hot springs at Waibasaga had temperatures from 56.95 to 57.95 degrees Celsius and densities from
The document discusses rivers and the hydrological cycle. It begins by explaining how rivers are an important resource for drinking water, transport, electricity and more. It then describes the three main processes by which rivers shape the land - erosion, transportation, and deposition. Erosion involves wearing away river banks and breaking down rock particles. As rivers transport sediment downstream, larger rocks can be moved in higher energy areas near the source, while finer particles are deposited where energy is lowest at the mouth. The document outlines the typical features of the upper, middle and lower courses of a river as its energy decreases downstream.
This report summarizes a geology field trip to Malekhu, Dhading district in Nepal. Key findings include:
1. The group studied river channel morphology of the Trishuli-Thopal river confluence, observing features like meandering rivers, erosion and deposition banks, and a rock island where the rivers meet.
2. The report describes geological structures observed in the field such as faults, folds, joints and bedding. Fault types including normal, reverse, thrust and strike-slip are defined. Folds are classified based on limb dip, axial plane, and shape.
3. Rock and mineral samples were collected and studied, including igneous, sedimentary and metamorphic
GFW Memorial Flood Level Marker Photo EssayClancyPh
This document summarizes the construction of the Gilbert F. White Memorial Flood Level Marker from July to November 2010. It provides photos documenting the various stages of construction, including marking the site, digging the foundation, installing anchors, erecting scaffolding, adding glass levels, landscaping, and completion. The finished memorial is a solar-powered glass obelisk illuminating flood levels from Boulder's history along Boulder Creek.
Rivers go through three stages as they flow from their source to the sea - youthful, mature, and old. In the youthful stage, the fast-moving river erodes the landscape, creating V-shaped valleys, interlocking spurs, and waterfalls. During the mature stage, the river transports eroded material and deposits it, forming wider valleys, meanders, and flood plains. In the slow-moving old stage, deposition creates features like ox-bow lakes, levees, and deltas at the river's mouth. Rivers have long been important to people for transportation, water, and more recently, power generation through hydroelectric dams.
The document describes waterfalls located along the River Twiss and River Doe near Ingleton, North Yorkshire. It includes photos and questions about the geology and features of the waterfalls, such as the vegetation, relief, and erosion patterns visible. Differential erosion has created circular plunge pools below harder limestone bands. Over time, waterfalls will move upstream, leaving steep gorges as the erosion process continues.
Restoration Techniques on the Rio Mora National Wildlife Refuge and Surroundi...RewildingInstitute
The Rio Mora National Wildlife Refuge is located on the high plains near the foothills of the Southern Rockies. The Refuge is located between 6,700 feet and 7,000 feet. It is the center of a U.S. Fish and Wildlife Service Conservation area covering 952,000 acres of the Mora River watershed. The Mora River starts on Osha Mountain in the Sangre de Cristo range. It begins at 10,000 feet of altitude, then flows eastward to enter the Canadian River at approximately 4,500 feet of altitude. Various locations along the Mora River will affect phenology sequences, but the heart of this book is the Rio Mora National Wildlife Refuge which is midway between the start and finish of the Mora River.
The following is an on-going project that a group of volunteers started several years ago on a lake in the
Adirondack state park. Lake Luzerne is fighting Eurasian Milfoil, a weed that has taken over many lakes all
over the country. This group of volunteers (The Aquatic Conservation Taskforce) has set up a website
(http://actluzerne.org/default.htm) which we recommend you visit. Below are progress reports from Bob
Sherman of A.C.T.
Geomorphology is the study of landforms on Earth's surface. Geomorphologists study landforms and examine their origins and how they impact human activity. Rivers play a key role in shaping landscapes through various processes like erosion, transportation, and deposition of sediments. As a river progresses through its youthful, mature, and old stages, it forms characteristic landforms like V-shaped valleys, meanders, floodplains, ox-bow lakes, and deltas.
San Elijo Hills Drainage Diversion storm drain line ‘n’ 1talerco
A fire hydrant was knocked over, spilling over 90,000 gallons of water into a storm drain line over 21 minutes. This caused erosion and transported sediment and rocks downstream. Photos show the progression of erosion over time from the initial incident and subsequent rains, including a boulder being toppled over. The temporary fix of adding rocks to an eroded area was deemed insufficient and exposed more land to erosion.
The document discusses different sedimentary environments and provides examples of each:
1) An example of erosion on a small scale showing harder surfaces preventing erosion underneath.
2) The marine environment being the continental shelf underwater, as seen in a photo of the Pacific Ocean.
3) A photo example of a continental environment with mountains collecting snow that melts into channels and deposits sediments downstream.
4) Transitional environments like coastlines and beaches seen in a photo of the author at a beach town as tides change the coastline exposure.
This document provides information about rivers and flooding, including:
1) It discusses the hydrological cycle and river landforms like meanders, ox-bow lakes, and deltas. Biological, freeze-thaw, and chemical weathering are explained.
2) Methods for managing flooding are examined, including both "hard" options like building flood defenses, and "softer" options like restoring floodplains.
3) Practice questions are provided about river features and processes like waterfall formation. Diagrams and explanations of answers are given.
This document provides information about rivers and flooding, including:
1) It discusses various river landforms and processes like meanders, floodplains, estuaries, and deltas. It also explains how v-shaped valleys and waterfalls are formed.
2) It covers causes of flooding like rainfall, soil permeability, and human impacts such as deforestation, farming, and urbanization.
3) It introduces hard and soft flood management options and provides examples like flood defenses and restoring natural floodplains. Practice questions are included about these topics.
Christmas tree tops are pinned down in flood conditions to trap silt, which is then planted with willow twigs to stop erosion. Willow weaving is used to protect riverbanks by weaving willow lengths around posts. Rock ramps are constructed to help migrating fish pass over barriers like bridge sills in low water conditions.
Restoration Techniques on the Rio Mora National Wildlife Refuge and Surroundi...RewildingInstitute
The Rio Mora National Wildlife Refuge is located on the high plains near the foothills of the Southern Rockies. The Refuge is located between 6,700 feet and 7,000 feet. It is the center of a U.S. Fish and Wildlife Service Conservation area covering 952,000 acres of the Mora River watershed. The Mora River starts on Osha Mountain in the Sangre de Cristo range. It begins at 10,000 feet of altitude, then flows eastward to enter the Canadian River at approximately 4,500 feet of altitude. Various locations along the Mora River will affect phenology sequences, but the heart of this book is the Rio Mora National Wildlife Refuge which is midway between the start and finish of the Mora River.
The following is an on-going project that a group of volunteers started several years ago on a lake in the
Adirondack state park. Lake Luzerne is fighting Eurasian Milfoil, a weed that has taken over many lakes all
over the country. This group of volunteers (The Aquatic Conservation Taskforce) has set up a website
(http://actluzerne.org/default.htm) which we recommend you visit. Below are progress reports from Bob
Sherman of A.C.T.
Geomorphology is the study of landforms on Earth's surface. Geomorphologists study landforms and examine their origins and how they impact human activity. Rivers play a key role in shaping landscapes through various processes like erosion, transportation, and deposition of sediments. As a river progresses through its youthful, mature, and old stages, it forms characteristic landforms like V-shaped valleys, meanders, floodplains, ox-bow lakes, and deltas.
San Elijo Hills Drainage Diversion storm drain line ‘n’ 1talerco
A fire hydrant was knocked over, spilling over 90,000 gallons of water into a storm drain line over 21 minutes. This caused erosion and transported sediment and rocks downstream. Photos show the progression of erosion over time from the initial incident and subsequent rains, including a boulder being toppled over. The temporary fix of adding rocks to an eroded area was deemed insufficient and exposed more land to erosion.
The document discusses different sedimentary environments and provides examples of each:
1) An example of erosion on a small scale showing harder surfaces preventing erosion underneath.
2) The marine environment being the continental shelf underwater, as seen in a photo of the Pacific Ocean.
3) A photo example of a continental environment with mountains collecting snow that melts into channels and deposits sediments downstream.
4) Transitional environments like coastlines and beaches seen in a photo of the author at a beach town as tides change the coastline exposure.
This document provides information about rivers and flooding, including:
1) It discusses the hydrological cycle and river landforms like meanders, ox-bow lakes, and deltas. Biological, freeze-thaw, and chemical weathering are explained.
2) Methods for managing flooding are examined, including both "hard" options like building flood defenses, and "softer" options like restoring floodplains.
3) Practice questions are provided about river features and processes like waterfall formation. Diagrams and explanations of answers are given.
This document provides information about rivers and flooding, including:
1) It discusses various river landforms and processes like meanders, floodplains, estuaries, and deltas. It also explains how v-shaped valleys and waterfalls are formed.
2) It covers causes of flooding like rainfall, soil permeability, and human impacts such as deforestation, farming, and urbanization.
3) It introduces hard and soft flood management options and provides examples like flood defenses and restoring natural floodplains. Practice questions are included about these topics.
Christmas tree tops are pinned down in flood conditions to trap silt, which is then planted with willow twigs to stop erosion. Willow weaving is used to protect riverbanks by weaving willow lengths around posts. Rock ramps are constructed to help migrating fish pass over barriers like bridge sills in low water conditions.
5. Photo taken of the trail while looking
south (heading towards bridge site).
Again, photo taken while looking
south. Note muddy conditions.
6. Below are photos taken in the same two areas as the ones taken on
the previous slide, in the same direction (south). Note that the
muddiness is gone!
7.
How did we do
it???
With a lot of hard work and the assistance of
awesome volunteers!!! Twelve volunteers from
the Wilderness Volunteers group came out with
three Forest Service employees, for seven days, to
help us accomplish our goals. We couldn’t have
done it with out them!
8.
Left: Volunteers and FS employee, Troy Sitton, de-
barking/skinning the 1st tree to be used as one of
the stringers for the bridge. Right: Volunteers doing
the same to the two sills that will be dug into the
ground to rest the stringers on.
9. Left: A volunteer removing bark
from the log and a couple more
picking up the debris. It’s important
to remove the bark from the tree so
that it doesn’t hold water and rot
the log. This makes the bridge last
longer.
Right: Troy and a volunteer starting
the plaining process. This is to create
a flat surface for the hiker to walk
on. You first make shallow cuts with
a saw across the length of the log,
then you chip them out with an ax
or Pulaski (see next slide).
10. Left: A volunteer uses a
Pulaski to chip out the pieces
of wood that now come off
easily after being cut, creating
a safer walking surface by
flattening the log and giving it
some tread.
Right: A volunteer fine tuning
the stringer by making small
adjustments with an ax. Troy
supervises to make sure he
doesn’t take too much off the
log.
11. Left: A volunteer helps Troy ax out a notch for the
stringer/log to sit on in order to add stability.
Right: Two volunteers take turns driving the rebar
into the stringer and sill. This ensures that the
bridge will not move or shift over time. Don’t be
fooled, that small sledge hammer weighs a lot and
it’s hard work forcing that rebar in, even though we
pre-drill a hole for it first.
12. A finished bridge, at a length of 32 feet 10
inches, with all the Wilderness Volunteers!
13. Left: Volunteers assisting FS employee Emmanuel River on
setting rocks for the turnpike. Right: Emmanuel considering
how many more rocks he will need for building.
14. Left: A volunteer sets a rock for the turnpike, and
in that location, a rock culvert. We chose to build
an all rock turnpike instead of wood and rock due
to the completely saturated soil conditions. When
building a turnpike, it is important to fill it with a
variety of different sized rocks to allow water to
permeate through the structure, before topping it
with soil and gravel.
Right: Four volunteers haul a
large rock for the turnpike using
a rock net.
15.
Culverts: An Important addition
in a saturated area.
Two rock culverts were created in the turnpike to allow
the ground water seepage to flow freely and to prevent it
from backing up and flooding the turnpike. It will also
allow snow melt to move more quickly out of the area,
allowing the ground to dry faster.
The two culverts are made entirely of rock
for a more natural look in the wilderness.
16. The finished product produces a stable and
sustainable walking surface for people and
animals alike! Total length was 60 feet!
17. A BIG THANKS to all the Wilderness
Volunteers for their help! With out them we
would not have been able to accomplish our
goals.