Note that during most of the Cretaceous, ocean circulation and primary productivity ware not very different from that of today. Which of the factors mentioned under 4a to 4d do you hold responsible for the shallow position of the Cretaceous lysocline? Give a brief explanation.

For at least the first half of Cretaceous Period, atmospheric temperatures were A. about the same as they are today, and sea levels were also similar B. at least 8 degrees warmer than today, and sea levels were high C. cooler than today and sea levels were lower

The Lewis thrust:Selected answer will be automatically saved. For keyboard navigation, press up/down arrow keys to select an answer.aFormed during the Cretaceous due to compressive forces related to subduction at the Western North American plate marginbThrust Precambrian rocks over Mesozoic sedimentscFormed during the Sevier orogenydAll of the aboveeNone of the above

Cretaceous period

Based on the information in the map, which fossils provide the best evidence for past tectonic plate arrangement?​Select the two correct answers.

Sediments at location L might exhibit which FOUR of the following characteristics?Group of answer choicesangular clastscross-beddingcurrent ripple-marksgraded beddingmoderately thick bedding (10-100 centimeters thick)mudcrackspoorly-sortedrounded claststhick-massive bedding (>1 meter thick)thin bedding / laminations (<3 centimeters thick)wave ripple markswell-sorted - moderately well sorted