“…Samples for measurement of particle size and determination of pebble lithology, shape, roundness, physical quality, and chemical quality were collected from vertical trenches taken at one to three locations and from one or two horizons at each of eight gravel pits. Sample spacing was guided by results of earlier studies (Lindsey and Shary, 1997;Lindsey andothers, 1998a and1998b). Each sample was processed in the field by dry sieving and weighing size fractions.…”
Section: Overview Of Methodsmentioning
confidence: 99%
“…Statistical models of deposit size (volume) can be prepared from dimensions of individual deposits shown on maps and cross-sections. Lindsey (1997) described five general geomorphic deposit models in the Colorado Front Range that reflect the map units utilized by Schwochow and others (1974a). These five models are dissected fans, high dissected terraces, high terraces, low terraces and modern floodplains, and eolian sand.…”
Section: Geomorphic Deposit Models Of the Cache La Poudre River Valleymentioning
confidence: 99%
“…4) that were mapped by Schwochow and others (1974a) in the Cache la Poudre River valley between Fort Collins and Greeley, Colorado. From the highest (oldest) to lowest (youngest) the major landforms are dissected terraces, alluvial fans, high terraces, and floodplains and low terraces (Lindsey, 1997).…”
Section: Geomorphic Deposit Models Of the Cache La Poudre River Valleymentioning
“…Samples for measurement of particle size and determination of pebble lithology, shape, roundness, physical quality, and chemical quality were collected from vertical trenches taken at one to three locations and from one or two horizons at each of eight gravel pits. Sample spacing was guided by results of earlier studies (Lindsey and Shary, 1997;Lindsey andothers, 1998a and1998b). Each sample was processed in the field by dry sieving and weighing size fractions.…”
Section: Overview Of Methodsmentioning
confidence: 99%
“…Statistical models of deposit size (volume) can be prepared from dimensions of individual deposits shown on maps and cross-sections. Lindsey (1997) described five general geomorphic deposit models in the Colorado Front Range that reflect the map units utilized by Schwochow and others (1974a). These five models are dissected fans, high dissected terraces, high terraces, low terraces and modern floodplains, and eolian sand.…”
Section: Geomorphic Deposit Models Of the Cache La Poudre River Valleymentioning
confidence: 99%
“…4) that were mapped by Schwochow and others (1974a) in the Cache la Poudre River valley between Fort Collins and Greeley, Colorado. From the highest (oldest) to lowest (youngest) the major landforms are dissected terraces, alluvial fans, high terraces, and floodplains and low terraces (Lindsey, 1997).…”
Section: Geomorphic Deposit Models Of the Cache La Poudre River Valleymentioning
“…Wind-formed dunes comprise a fourth landform of Quaternary age in the South Platte valley. The four landforms are the basis for corresponding aggregate deposit models (Lindsey, 1997). In the area studied, dissected high terraces are underlain by isolated erosional remnants of thin alluvial gravel deposits on hills overlooking the South Platte valley (Figure 2).…”
Section: Stratigraphy Of Quaternary Alluviummentioning
“…Each area is a population center and market area with a radius of about 56-kilometers. TYPES OF AGGREGA AGGREGA AGGREGA AGGREGA AGGREGATE RESOURCES TE RESOURCES TE RESOURCES TE RESOURCES TE RESOURCES IN IN IN IN IN THE COLORADO FRONT THE COLORADO FRONT THE COLORADO FRONT THE COLORADO FRONT THE COLORADO FRONT RANGE RANGE RANGE RANGE RANGE Sand and gravel Sand and gravel Sand and gravel Sand and gravel Sand and gravel Lindsey (1997) described four general types of sand and gravel deposits in the Colorado Front Range ( fig. 2).…”
Introduction 1 Acknowledgements 2 Types of aggregate resources in the Colorado Front Range 2 Sand and gravel 2 Crushed stone 2 Resource availability 3 Producing aggregates for use 4 History of Colorado aggregate production 5 History of Colorado Front Range aggregate resource accessibility 7 Future production of aggregates 9 Future supply of aggregates in the Colorado Front Range 14 Sand and gravel 14 Crushed stone 16 Recycling 17 Discussion 18 Summary 20 Conclusions 20 References 21
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